Merge branch 'switch-rails' into 'master'

Switch to Rails 5

Closes #14286 and #48991

See merge request gitlab-org/gitlab-ce!21492

23 files changed, 741 insertions, 797 deletions

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index b929a30bf25..94922aec598 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -75,15 +75,15 @@ stages:
     - mysql:5.7
     - redis:alpine
 
-.rails5: &rails5
-  allow_failure: true
-  only:
+.rails4: &rails4
+  allow_failure: false
+  except:
     variables:
-      - $CI_COMMIT_REF_NAME =~ /rails5/
-      - $RAILS5_ENABLED
+      - $CI_COMMIT_REF_NAME =~ /norails4/
+      - $RAILS5_DISABLED
   variables:
-    BUNDLE_GEMFILE: "Gemfile.rails5"
-    RAILS5: "true"
+    BUNDLE_GEMFILE: "Gemfile.rails4"
+    RAILS5: "false"
 
 # Skip all jobs except the ones that begin with 'docs/'.
 # Used for commits including ONLY documentation changes.
@@ -177,17 +177,17 @@ stages:
   <<: *rspec-metadata
   <<: *use-pg
 
-.rspec-metadata-pg-rails5: &rspec-metadata-pg-rails5
+.rspec-metadata-pg-rails4: &rspec-metadata-pg-rails4
   <<: *rspec-metadata-pg
-  <<: *rails5
+  <<: *rails4
 
 .rspec-metadata-mysql: &rspec-metadata-mysql
   <<: *rspec-metadata
   <<: *use-mysql
 
-.rspec-metadata-mysql-rails5: &rspec-metadata-mysql-rails5
+.rspec-metadata-mysql-rails4: &rspec-metadata-mysql-rails4
   <<: *rspec-metadata-mysql
-  <<: *rails5
+  <<: *rails4
 
 .only-canonical-masters: &only-canonical-masters
   only:
@@ -429,7 +429,7 @@ setup-test-env:
   script:
     - bundle exec ruby -Ispec -e 'require "spec_helper" ; TestEnv.init'
     - scripts/gitaly-test-build # Do not use 'bundle exec' here
-    - BUNDLE_GEMFILE=Gemfile.rails5 bundle install $BUNDLE_INSTALL_FLAGS
+    - BUNDLE_GEMFILE=Gemfile.rails4 bundle install $BUNDLE_INSTALL_FLAGS
   artifacts:
     expire_in: 7d
     paths:
@@ -521,67 +521,67 @@ rspec-mysql 27 30: *rspec-metadata-mysql
 rspec-mysql 28 30: *rspec-metadata-mysql
 rspec-mysql 29 30: *rspec-metadata-mysql
 
-rspec-pg-rails5 0 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 1 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 2 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 3 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 4 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 5 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 6 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 7 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 8 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 9 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 10 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 11 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 12 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 13 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 14 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 15 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 16 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 17 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 18 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 19 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 20 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 21 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 22 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 23 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 24 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 25 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 26 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 27 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 28 30: *rspec-metadata-pg-rails5
-rspec-pg-rails5 29 30: *rspec-metadata-pg-rails5
-
-rspec-mysql-rails5 0 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 1 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 2 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 3 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 4 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 5 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 6 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 7 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 8 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 9 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 10 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 11 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 12 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 13 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 14 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 15 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 16 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 17 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 18 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 19 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 20 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 21 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 22 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 23 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 24 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 25 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 26 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 27 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 28 30: *rspec-metadata-mysql-rails5
-rspec-mysql-rails5 29 30: *rspec-metadata-mysql-rails5
+rspec-pg-rails4 0 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 1 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 2 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 3 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 4 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 5 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 6 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 7 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 8 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 9 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 10 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 11 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 12 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 13 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 14 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 15 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 16 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 17 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 18 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 19 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 20 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 21 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 22 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 23 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 24 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 25 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 26 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 27 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 28 30: *rspec-metadata-pg-rails4
+rspec-pg-rails4 29 30: *rspec-metadata-pg-rails4
+
+rspec-mysql-rails4 0 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 1 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 2 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 3 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 4 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 5 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 6 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 7 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 8 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 9 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 10 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 11 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 12 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 13 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 14 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 15 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 16 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 17 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 18 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 19 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 20 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 21 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 22 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 23 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 24 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 25 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 26 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 27 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 28 30: *rspec-metadata-mysql-rails4
+rspec-mysql-rails4 29 30: *rspec-metadata-mysql-rails4
 
 static-analysis:
   <<: *dedicated-no-docs-no-db-pull-cache-job
@@ -627,11 +627,11 @@ downtime_check:
     - /(^docs[\/-].*|.*-docs$)/
     - /(^qa[\/-].*|.*-qa$)/
 
-rails5_gemfile_lock_check:
+rails4_gemfile_lock_check:
   <<: *dedicated-no-docs-no-db-pull-cache-job
   <<: *except-docs-and-qa
   script:
-    - scripts/rails5-gemfile-lock-check
+    - scripts/rails4-gemfile-lock-check
 
 ee_compat_check:
   <<: *rake-exec
diff --git a/Gemfile b/Gemfile
index fdadea8c658..7030bd9c5e8 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,6 +1,6 @@
 # --- Special code for migrating to Rails 5.0 ---
 def rails5?
-  %w[1 true].include?(ENV["RAILS5"])
+  !%w[0 false].include?(ENV["RAILS5"])
 end
 
 gem_versions = {}
diff --git a/Gemfile.lock b/Gemfile.lock
index 5bec40de909..f08855ed049 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -4,41 +4,44 @@ GEM
     RedCloth (4.3.2)
     abstract_type (0.0.7)
     ace-rails-ap (4.1.2)
-    actionmailer (4.2.10)
-      actionpack (= 4.2.10)
-      actionview (= 4.2.10)
-      activejob (= 4.2.10)
+    actioncable (5.0.7)
+      actionpack (= 5.0.7)
+      nio4r (>= 1.2, < 3.0)
+      websocket-driver (~> 0.6.1)
+    actionmailer (5.0.7)
+      actionpack (= 5.0.7)
+      actionview (= 5.0.7)
+      activejob (= 5.0.7)
       mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
-    actionpack (4.2.10)
-      actionview (= 4.2.10)
-      activesupport (= 4.2.10)
-      rack (~> 1.6)
-      rack-test (~> 0.6.2)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-dom-testing (~> 2.0)
+    actionpack (5.0.7)
+      actionview (= 5.0.7)
+      activesupport (= 5.0.7)
+      rack (~> 2.0)
+      rack-test (~> 0.6.3)
+      rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (4.2.10)
-      activesupport (= 4.2.10)
+    actionview (5.0.7)
+      activesupport (= 5.0.7)
       builder (~> 3.1)
       erubis (~> 2.7.0)
-      rails-dom-testing (~> 1.0, >= 1.0.5)
+      rails-dom-testing (~> 2.0)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (4.2.10)
-      activesupport (= 4.2.10)
-      globalid (>= 0.3.0)
-    activemodel (4.2.10)
-      activesupport (= 4.2.10)
-      builder (~> 3.1)
-    activerecord (4.2.10)
-      activemodel (= 4.2.10)
-      activesupport (= 4.2.10)
-      arel (~> 6.0)
-    activerecord_sane_schema_dumper (0.2)
-      rails (>= 4, < 5)
-    activesupport (4.2.10)
-      i18n (~> 0.7)
+    activejob (5.0.7)
+      activesupport (= 5.0.7)
+      globalid (>= 0.3.6)
+    activemodel (5.0.7)
+      activesupport (= 5.0.7)
+    activerecord (5.0.7)
+      activemodel (= 5.0.7)
+      activesupport (= 5.0.7)
+      arel (~> 7.0)
+    activerecord_sane_schema_dumper (1.0)
+      rails (>= 5, < 6)
+    activesupport (5.0.7)
+      concurrent-ruby (~> 1.0, >= 1.0.2)
+      i18n (>= 0.7, < 2)
       minitest (~> 5.1)
-      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     acts-as-taggable-on (5.0.0)
       activerecord (>= 4.2.8)
@@ -49,7 +52,7 @@ GEM
       public_suffix (>= 2.0.2, < 4.0)
     aes_key_wrap (1.0.1)
     akismet (2.0.0)
-    arel (6.0.4)
+    arel (7.1.4)
     asana (0.6.0)
       faraday (~> 0.9)
       faraday_middleware (~> 0.9)
@@ -143,8 +146,8 @@ GEM
       html-pipeline
     declarative (0.0.10)
     declarative-option (0.1.0)
-    default_value_for (3.0.2)
-      activerecord (>= 3.2.0, < 5.1)
+    default_value_for (3.0.5)
+      activerecord (>= 3.2.0, < 5.2)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     device_detector (1.0.0)
@@ -376,7 +379,7 @@ GEM
       json (~> 1.8)
       multi_xml (>= 0.5.2)
     httpclient (2.8.3)
-    i18n (0.9.5)
+    i18n (1.1.0)
       concurrent-ruby (~> 1.0)
     icalendar (2.4.1)
     ice_nine (0.11.2)
@@ -470,6 +473,7 @@ GEM
     net-ldap (0.16.0)
     net-ssh (5.0.1)
     netrc (0.11.0)
+    nio4r (2.3.1)
     nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
     nokogumbo (1.5.0)
@@ -598,7 +602,7 @@ GEM
       get_process_mem (~> 0.2)
       puma (>= 2.7, < 4)
     pyu-ruby-sasl (0.0.3.3)
-    rack (1.6.11)
+    rack (2.0.5)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-attack (4.4.1)
@@ -616,31 +620,36 @@ GEM
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (4.2.10)
-      actionmailer (= 4.2.10)
-      actionpack (= 4.2.10)
-      actionview (= 4.2.10)
-      activejob (= 4.2.10)
-      activemodel (= 4.2.10)
-      activerecord (= 4.2.10)
-      activesupport (= 4.2.10)
-      bundler (>= 1.3.0, < 2.0)
-      railties (= 4.2.10)
-      sprockets-rails
+    rails (5.0.7)
+      actioncable (= 5.0.7)
+      actionmailer (= 5.0.7)
+      actionpack (= 5.0.7)
+      actionview (= 5.0.7)
+      activejob (= 5.0.7)
+      activemodel (= 5.0.7)
+      activerecord (= 5.0.7)
+      activesupport (= 5.0.7)
+      bundler (>= 1.3.0)
+      railties (= 5.0.7)
+      sprockets-rails (>= 2.0.0)
+    rails-controller-testing (1.0.2)
+      actionpack (~> 5.x, >= 5.0.1)
+      actionview (~> 5.x, >= 5.0.1)
+      activesupport (~> 5.x)
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (1.0.9)
-      activesupport (>= 4.2.0, < 5.0)
-      nokogiri (~> 1.6)
-      rails-deprecated_sanitizer (>= 1.0.1)
+    rails-dom-testing (2.0.3)
+      activesupport (>= 4.2.0)
+      nokogiri (>= 1.6)
     rails-html-sanitizer (1.0.4)
       loofah (~> 2.2, >= 2.2.2)
-    rails-i18n (4.0.9)
-      i18n (~> 0.7)
-      railties (~> 4.0)
-    railties (4.2.10)
-      actionpack (= 4.2.10)
-      activesupport (= 4.2.10)
+    rails-i18n (5.1.1)
+      i18n (>= 0.7, < 2)
+      railties (>= 5.0, < 6)
+    railties (5.0.7)
+      actionpack (= 5.0.7)
+      activesupport (= 5.0.7)
+      method_source
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (3.0.0)
@@ -731,8 +740,7 @@ GEM
       rspec-core
     rspec-set (0.1.3)
     rspec-support (3.7.1)
-    rspec_junit_formatter (0.2.3)
-      builder (< 4)
+    rspec_junit_formatter (0.4.1)
       rspec-core (>= 2, < 4, != 2.12.0)
     rspec_profiling (0.0.5)
       activerecord
@@ -849,8 +857,6 @@ GEM
     sysexits (1.2.0)
     temple (0.8.0)
     test-prof (0.2.5)
-    test_after_commit (1.1.0)
-      activerecord (>= 3.2)
     text (1.3.1)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
@@ -913,6 +919,9 @@ GEM
       hashdiff
     webpack-rails (0.9.11)
       railties (>= 3.2.0)
+    websocket-driver (0.6.5)
+      websocket-extensions (>= 0.1.0)
+    websocket-extensions (0.1.3)
     wikicloth (0.8.1)
       builder
       expression_parser
@@ -928,7 +937,7 @@ PLATFORMS
 DEPENDENCIES
   RedCloth (~> 4.3.2)
   ace-rails-ap (~> 4.1.0)
-  activerecord_sane_schema_dumper (= 0.2)
+  activerecord_sane_schema_dumper (= 1.0)
   acts-as-taggable-on (~> 5.0)
   addressable (~> 2.5.2)
   akismet (~> 2.0)
@@ -962,7 +971,7 @@ DEPENDENCIES
   creole (~> 0.5.0)
   database_cleaner (~> 1.5.0)
   deckar01-task_list (= 2.0.0)
-  default_value_for (~> 3.0.0)
+  default_value_for (~> 3.0.5)
   device_detector
   devise (~> 4.4)
   devise-two-factor (~> 3.0.0)
@@ -1080,9 +1089,10 @@ DEPENDENCIES
   rack-cors (~> 1.0.0)
   rack-oauth2 (~> 1.2.1)
   rack-proxy (~> 0.6.0)
-  rails (= 4.2.10)
+  rails (= 5.0.7)
+  rails-controller-testing
   rails-deprecated_sanitizer (~> 1.0.3)
-  rails-i18n (~> 4.0.9)
+  rails-i18n (~> 5.1)
   rainbow (~> 3.0)
   raindrops (~> 0.18)
   rblineprof (~> 0.3.6)
@@ -1135,7 +1145,6 @@ DEPENDENCIES
   state_machines-activerecord (~> 0.5.1)
   sys-filesystem (~> 1.1.6)
   test-prof (~> 0.2.5)
-  test_after_commit (~> 1.1)
   thin (~> 1.7.0)
   timecop (~> 0.8.0)
   toml-rb (~> 1.0.0)
diff --git a/Gemfile.rails4 b/Gemfile.rails4
new file mode 100644
index 00000000000..0ec00e702aa
--- /dev/null
+++ b/Gemfile.rails4
@@ -0,0 +1,7 @@
+# BUNDLE_GEMFILE=Gemfile.rails4 bundle install
+
+ENV["RAILS5"] = "false"
+
+gemfile = File.expand_path("../Gemfile", __FILE__)
+
+eval(File.read(gemfile), nil, gemfile)
diff --git a/Gemfile.rails5.lock b/Gemfile.rails4.lock
index 4d4f9032a6f..5bec40de909 100644
--- a/Gemfile.rails5.lock
+++ b/Gemfile.rails4.lock
@@ -4,44 +4,41 @@ GEM
     RedCloth (4.3.2)
     abstract_type (0.0.7)
     ace-rails-ap (4.1.2)
-    actioncable (5.0.7)
-      actionpack (= 5.0.7)
-      nio4r (>= 1.2, < 3.0)
-      websocket-driver (~> 0.6.1)
-    actionmailer (5.0.7)
-      actionpack (= 5.0.7)
-      actionview (= 5.0.7)
-      activejob (= 5.0.7)
+    actionmailer (4.2.10)
+      actionpack (= 4.2.10)
+      actionview (= 4.2.10)
+      activejob (= 4.2.10)
       mail (~> 2.5, >= 2.5.4)
-      rails-dom-testing (~> 2.0)
-    actionpack (5.0.7)
-      actionview (= 5.0.7)
-      activesupport (= 5.0.7)
-      rack (~> 2.0)
-      rack-test (~> 0.6.3)
-      rails-dom-testing (~> 2.0)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
+    actionpack (4.2.10)
+      actionview (= 4.2.10)
+      activesupport (= 4.2.10)
+      rack (~> 1.6)
+      rack-test (~> 0.6.2)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.2)
-    actionview (5.0.7)
-      activesupport (= 5.0.7)
+    actionview (4.2.10)
+      activesupport (= 4.2.10)
       builder (~> 3.1)
       erubis (~> 2.7.0)
-      rails-dom-testing (~> 2.0)
+      rails-dom-testing (~> 1.0, >= 1.0.5)
       rails-html-sanitizer (~> 1.0, >= 1.0.3)
-    activejob (5.0.7)
-      activesupport (= 5.0.7)
-      globalid (>= 0.3.6)
-    activemodel (5.0.7)
-      activesupport (= 5.0.7)
-    activerecord (5.0.7)
-      activemodel (= 5.0.7)
-      activesupport (= 5.0.7)
-      arel (~> 7.0)
-    activerecord_sane_schema_dumper (1.0)
-      rails (>= 5, < 6)
-    activesupport (5.0.7)
-      concurrent-ruby (~> 1.0, >= 1.0.2)
-      i18n (>= 0.7, < 2)
+    activejob (4.2.10)
+      activesupport (= 4.2.10)
+      globalid (>= 0.3.0)
+    activemodel (4.2.10)
+      activesupport (= 4.2.10)
+      builder (~> 3.1)
+    activerecord (4.2.10)
+      activemodel (= 4.2.10)
+      activesupport (= 4.2.10)
+      arel (~> 6.0)
+    activerecord_sane_schema_dumper (0.2)
+      rails (>= 4, < 5)
+    activesupport (4.2.10)
+      i18n (~> 0.7)
       minitest (~> 5.1)
+      thread_safe (~> 0.3, >= 0.3.4)
       tzinfo (~> 1.1)
     acts-as-taggable-on (5.0.0)
       activerecord (>= 4.2.8)
@@ -52,7 +49,7 @@ GEM
       public_suffix (>= 2.0.2, < 4.0)
     aes_key_wrap (1.0.1)
     akismet (2.0.0)
-    arel (7.1.4)
+    arel (6.0.4)
     asana (0.6.0)
       faraday (~> 0.9)
       faraday_middleware (~> 0.9)
@@ -146,8 +143,8 @@ GEM
       html-pipeline
     declarative (0.0.10)
     declarative-option (0.1.0)
-    default_value_for (3.0.5)
-      activerecord (>= 3.2.0, < 5.2)
+    default_value_for (3.0.2)
+      activerecord (>= 3.2.0, < 5.1)
     descendants_tracker (0.0.4)
       thread_safe (~> 0.3, >= 0.3.1)
     device_detector (1.0.0)
@@ -379,7 +376,7 @@ GEM
       json (~> 1.8)
       multi_xml (>= 0.5.2)
     httpclient (2.8.3)
-    i18n (1.1.0)
+    i18n (0.9.5)
       concurrent-ruby (~> 1.0)
     icalendar (2.4.1)
     ice_nine (0.11.2)
@@ -454,9 +451,9 @@ GEM
     memoizable (0.4.2)
       thread_safe (~> 0.3, >= 0.3.1)
     method_source (0.9.0)
-    mime-types (3.1)
+    mime-types (3.2.2)
       mime-types-data (~> 3.2015)
-    mime-types-data (3.2016.0521)
+    mime-types-data (3.2018.0812)
     mimemagic (0.3.0)
     mini_magick (4.8.0)
     mini_mime (1.0.1)
@@ -473,7 +470,6 @@ GEM
     net-ldap (0.16.0)
     net-ssh (5.0.1)
     netrc (0.11.0)
-    nio4r (2.3.1)
     nokogiri (1.8.4)
       mini_portile2 (~> 2.3.0)
     nokogumbo (1.5.0)
@@ -602,7 +598,7 @@ GEM
       get_process_mem (~> 0.2)
       puma (>= 2.7, < 4)
     pyu-ruby-sasl (0.0.3.3)
-    rack (2.0.5)
+    rack (1.6.11)
     rack-accept (0.4.5)
       rack (>= 0.4)
     rack-attack (4.4.1)
@@ -620,36 +616,31 @@ GEM
       rack
     rack-test (0.6.3)
       rack (>= 1.0)
-    rails (5.0.7)
-      actioncable (= 5.0.7)
-      actionmailer (= 5.0.7)
-      actionpack (= 5.0.7)
-      actionview (= 5.0.7)
-      activejob (= 5.0.7)
-      activemodel (= 5.0.7)
-      activerecord (= 5.0.7)
-      activesupport (= 5.0.7)
-      bundler (>= 1.3.0)
-      railties (= 5.0.7)
-      sprockets-rails (>= 2.0.0)
-    rails-controller-testing (1.0.2)
-      actionpack (~> 5.x, >= 5.0.1)
-      actionview (~> 5.x, >= 5.0.1)
-      activesupport (~> 5.x)
+    rails (4.2.10)
+      actionmailer (= 4.2.10)
+      actionpack (= 4.2.10)
+      actionview (= 4.2.10)
+      activejob (= 4.2.10)
+      activemodel (= 4.2.10)
+      activerecord (= 4.2.10)
+      activesupport (= 4.2.10)
+      bundler (>= 1.3.0, < 2.0)
+      railties (= 4.2.10)
+      sprockets-rails
     rails-deprecated_sanitizer (1.0.3)
       activesupport (>= 4.2.0.alpha)
-    rails-dom-testing (2.0.3)
-      activesupport (>= 4.2.0)
-      nokogiri (>= 1.6)
+    rails-dom-testing (1.0.9)
+      activesupport (>= 4.2.0, < 5.0)
+      nokogiri (~> 1.6)
+      rails-deprecated_sanitizer (>= 1.0.1)
     rails-html-sanitizer (1.0.4)
       loofah (~> 2.2, >= 2.2.2)
-    rails-i18n (5.1.1)
-      i18n (>= 0.7, < 2)
-      railties (>= 5.0, < 6)
-    railties (5.0.7)
-      actionpack (= 5.0.7)
-      activesupport (= 5.0.7)
-      method_source
+    rails-i18n (4.0.9)
+      i18n (~> 0.7)
+      railties (~> 4.0)
+    railties (4.2.10)
+      actionpack (= 4.2.10)
+      activesupport (= 4.2.10)
       rake (>= 0.8.7)
       thor (>= 0.18.1, < 2.0)
     rainbow (3.0.0)
@@ -740,7 +731,8 @@ GEM
       rspec-core
     rspec-set (0.1.3)
     rspec-support (3.7.1)
-    rspec_junit_formatter (0.4.1)
+    rspec_junit_formatter (0.2.3)
+      builder (< 4)
       rspec-core (>= 2, < 4, != 2.12.0)
     rspec_profiling (0.0.5)
       activerecord
@@ -857,6 +849,8 @@ GEM
     sysexits (1.2.0)
     temple (0.8.0)
     test-prof (0.2.5)
+    test_after_commit (1.1.0)
+      activerecord (>= 3.2)
     text (1.3.1)
     thin (1.7.2)
       daemons (~> 1.0, >= 1.0.9)
@@ -919,9 +913,6 @@ GEM
       hashdiff
     webpack-rails (0.9.11)
       railties (>= 3.2.0)
-    websocket-driver (0.6.5)
-      websocket-extensions (>= 0.1.0)
-    websocket-extensions (0.1.3)
     wikicloth (0.8.1)
       builder
       expression_parser
@@ -937,7 +928,7 @@ PLATFORMS
 DEPENDENCIES
   RedCloth (~> 4.3.2)
   ace-rails-ap (~> 4.1.0)
-  activerecord_sane_schema_dumper (= 1.0)
+  activerecord_sane_schema_dumper (= 0.2)
   acts-as-taggable-on (~> 5.0)
   addressable (~> 2.5.2)
   akismet (~> 2.0)
@@ -971,7 +962,7 @@ DEPENDENCIES
   creole (~> 0.5.0)
   database_cleaner (~> 1.5.0)
   deckar01-task_list (= 2.0.0)
-  default_value_for (~> 3.0.5)
+  default_value_for (~> 3.0.0)
   device_detector
   devise (~> 4.4)
   devise-two-factor (~> 3.0.0)
@@ -1089,10 +1080,9 @@ DEPENDENCIES
   rack-cors (~> 1.0.0)
   rack-oauth2 (~> 1.2.1)
   rack-proxy (~> 0.6.0)
-  rails (= 5.0.7)
-  rails-controller-testing
+  rails (= 4.2.10)
   rails-deprecated_sanitizer (~> 1.0.3)
-  rails-i18n (~> 5.1)
+  rails-i18n (~> 4.0.9)
   rainbow (~> 3.0)
   raindrops (~> 0.18)
   rblineprof (~> 0.3.6)
@@ -1145,6 +1135,7 @@ DEPENDENCIES
   state_machines-activerecord (~> 0.5.1)
   sys-filesystem (~> 1.1.6)
   test-prof (~> 0.2.5)
+  test_after_commit (~> 1.1)
   thin (~> 1.7.0)
   timecop (~> 0.8.0)
   toml-rb (~> 1.0.0)
diff --git a/app/models/application_record.rb b/app/models/application_record.rb
new file mode 100644
index 00000000000..71fbba5b328
--- /dev/null
+++ b/app/models/application_record.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+class ApplicationRecord < ActiveRecord::Base
+  self.abstract_class = true
+end
diff --git a/bin/rails b/bin/rails
index 228f812ccaf..d21b64b3007 100755
--- a/bin/rails
+++ b/bin/rails
@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 # Remove this block when upgraded to rails 5.0.
-unless %w[1 true].include?(ENV["RAILS5"])
+if %w[0 false].include?(ENV["RAILS5"])
   begin
     load File.expand_path('../spring', __FILE__)
   rescue LoadError => e
diff --git a/bin/rake b/bin/rake
index b52a8321f1a..1362d51e3d6 100755
--- a/bin/rake
+++ b/bin/rake
@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 # Remove this block when upgraded to rails 5.0.
-unless %w[1 true].include?(ENV["RAILS5"])
+if %w[0 false].include?(ENV["RAILS5"])
   begin
     load File.expand_path('../spring', __FILE__)
   rescue LoadError => e
diff --git a/bin/rspec b/bin/rspec
index 26583242051..b0770e30a70 100755
--- a/bin/rspec
+++ b/bin/rspec
@@ -2,7 +2,7 @@
 
 # Remove these two lines below when upgraded to rails 5.0.
 # Allow run `rspec` command as `RAILS5=1 rspec ...` instead of `BUNDLE_GEMFILE=Gemfile.rails5 rspec ...`
-gemfile = %w[1 true].include?(ENV["RAILS5"]) ? "Gemfile.rails5" : "Gemfile"
+gemfile = %w[0 false].include?(ENV["RAILS5"]) ? "Gemfile.rails4" : "Gemfile"
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path("../#{gemfile}", __dir__)
 
 begin
diff --git a/bin/setup b/bin/setup
index ec1ebe02950..34bb667087a 100755
--- a/bin/setup
+++ b/bin/setup
@@ -1,7 +1,7 @@
 #!/usr/bin/env ruby
 
 def rails5?
-  %w[1 true].include?(ENV["RAILS5"])
+  !%w[0 false].include?(ENV["RAILS5"])
 end
 
 require "pathname"
diff --git a/changelogs/unreleased/switch-rails.yml b/changelogs/unreleased/switch-rails.yml
new file mode 100644
index 00000000000..4edf709dbd4
--- /dev/null
+++ b/changelogs/unreleased/switch-rails.yml
@@ -0,0 +1,5 @@
+---
+title: Switch to Rails 5
+merge_request: 21492
+author:
+type: other
diff --git a/config/application.rb b/config/application.rb
index 95b0f74a5a3..1b084e91cfb 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -8,7 +8,7 @@ module Gitlab
   # This method is used for smooth upgrading from the current Rails 4.x to Rails 5.0.
   # https://gitlab.com/gitlab-org/gitlab-ce/issues/14286
   def self.rails5?
-    ENV["RAILS5"].in?(%w[1 true])
+    !%w[0 false].include?(ENV["RAILS5"])
   end
 
   class Application < Rails::Application
diff --git a/config/boot.rb b/config/boot.rb
index 655c54ddb84..1aeacdabbad 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,10 +1,10 @@
 def rails5?
-  %w[1 true].include?(ENV["RAILS5"])
+  !%w[0 false].include?(ENV["RAILS5"])
 end
 
 require 'rubygems' unless rails5?
 
-gemfile = rails5? ? "Gemfile.rails5" : "Gemfile"
+gemfile = rails5? ? "Gemfile" : "Gemfile.rails4"
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path("../#{gemfile}", __dir__)
 
 # Set up gems listed in the Gemfile.
diff --git a/config/environment.rb b/config/environment.rb
index 5d35937f7c6..3a52656a2c1 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,10 +1,10 @@
 # Load the rails application
 
 # Remove this condition when upgraded to rails 5.0.
-if %w[1 true].include?(ENV["RAILS5"])
-  require_relative 'application'
-else
+if %w[0 false].include?(ENV["RAILS5"])
   require File.expand_path('application', __dir__)
+else
+  require_relative 'application'
 end
 
 # Initialize the rails application
diff --git a/config/initializers/mysql_set_length_for_binary_indexes.rb b/config/initializers/mysql_set_length_for_binary_indexes.rb
index 81ed2fb83de..0445d8fcae2 100644
--- a/config/initializers/mysql_set_length_for_binary_indexes.rb
+++ b/config/initializers/mysql_set_length_for_binary_indexes.rb
@@ -24,28 +24,46 @@ if defined?(ActiveRecord::ConnectionAdapters::Mysql2Adapter)
   ActiveRecord::ConnectionAdapters::Mysql2Adapter.send(:prepend, MysqlSetLengthForBinaryIndex)
 end
 
-if Gitlab.rails5?
-  module MysqlSetLengthForBinaryIndexAndIgnorePostgresOptionsForSchema
-    # This method is used in Rails 5 schema loading as t.index
-    def index(column_names, options = {})
-      options[:length] ||= {}
-      Array(column_names).each do |column_name|
-        column = columns.find { |c| c.name == column_name }
-
-        if column&.type == :binary
-          options[:length][column_name] = 20
-        end
-      end
+module MysqlSetLengthForBinaryIndexAndIgnorePostgresOptionsForSchema
+  # This method is used in Rails 5 schema loading as t.index
+  def index(column_names, options = {})
+    # Ignore indexes that use opclasses,
+    # also see config/initializers/mysql_ignore_postgresql_options.rb
+    if options[:opclasses]
+      warn "WARNING: index on columns #{column_names} uses unsupported option, skipping."
+      return
+    end
+
+    # when running rails 4 with rails 5 schema, rails 4 doesn't support multiple
+    # indexes on the same set of columns. Mysql doesn't support partial indexes, so if
+    # an index already exists and we add another index, skip it if it's partial:
+    # see https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21492#note_102821326
+    if !Gitlab.rails5? && indexes[column_names] && options[:where]
+      warn "WARNING: index on columns #{column_names} already exists and partial index is not supported, skipping."
+      return
+    end
+
+    options[:length] ||= {}
+    Array(column_names).each do |column_name|
+      column = columns.find { |c| c.name == column_name }
 
-      # Ignore indexes that use opclasses,
-      # also see config/initializers/mysql_ignore_postgresql_options.rb
-      unless options[:opclasses]
-        super(column_names, options)
+      if column&.type == :binary
+        options[:length][column_name] = 20
       end
     end
+
+    super(column_names, options)
   end
+end
 
+def mysql_adapter?
+  defined?(ActiveRecord::ConnectionAdapters::Mysql2Adapter) && ActiveRecord::Base.connection.is_a?(ActiveRecord::ConnectionAdapters::Mysql2Adapter)
+end
+
+if Gitlab.rails5?
   if defined?(ActiveRecord::ConnectionAdapters::MySQL::TableDefinition)
     ActiveRecord::ConnectionAdapters::MySQL::TableDefinition.send(:prepend, MysqlSetLengthForBinaryIndexAndIgnorePostgresOptionsForSchema)
   end
+elsif mysql_adapter? && defined?(ActiveRecord::ConnectionAdapters::TableDefinition)
+  ActiveRecord::ConnectionAdapters::TableDefinition.send(:prepend, MysqlSetLengthForBinaryIndexAndIgnorePostgresOptionsForSchema)
 end
diff --git a/db/schema.rb b/db/schema.rb
index bea5ff1ca05..deaa2d30b26 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1,4 +1,3 @@
-# encoding: UTF-8
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
@@ -126,7 +125,7 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "unique_ips_limit_enabled", default: false, null: false
     t.string "default_artifacts_expire_in", default: "0", null: false
     t.string "uuid"
-    t.decimal "polling_interval_multiplier", default: 1.0, null: false
+    t.decimal "polling_interval_multiplier", default: "1.0", null: false
     t.integer "cached_markdown_version"
     t.boolean "clientside_sentry_enabled", default: false, null: false
     t.string "clientside_sentry_dsn"
@@ -177,10 +176,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.text "details"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["entity_id", "entity_type"], name: "index_audit_events_on_entity_id_and_entity_type", using: :btree
   end
 
-  add_index "audit_events", ["entity_id", "entity_type"], name: "index_audit_events_on_entity_id_and_entity_type", using: :btree
-
   create_table "award_emoji", force: :cascade do |t|
     t.string "name"
     t.integer "user_id"
@@ -188,11 +186,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "awardable_type"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["awardable_type", "awardable_id"], name: "index_award_emoji_on_awardable_type_and_awardable_id", using: :btree
+    t.index ["user_id", "name"], name: "index_award_emoji_on_user_id_and_name", using: :btree
   end
 
-  add_index "award_emoji", ["awardable_type", "awardable_id"], name: "index_award_emoji_on_awardable_type_and_awardable_id", using: :btree
-  add_index "award_emoji", ["user_id", "name"], name: "index_award_emoji_on_user_id_and_name", using: :btree
-
   create_table "badges", force: :cascade do |t|
     t.string "link_url", null: false
     t.string "image_url", null: false
@@ -201,47 +198,43 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "type", null: false
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
+    t.index ["group_id"], name: "index_badges_on_group_id", using: :btree
+    t.index ["project_id"], name: "index_badges_on_project_id", using: :btree
   end
 
-  add_index "badges", ["group_id"], name: "index_badges_on_group_id", using: :btree
-  add_index "badges", ["project_id"], name: "index_badges_on_project_id", using: :btree
-
   create_table "board_group_recent_visits", id: :bigserial, force: :cascade do |t|
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
     t.integer "user_id"
     t.integer "board_id"
     t.integer "group_id"
+    t.index ["board_id"], name: "index_board_group_recent_visits_on_board_id", using: :btree
+    t.index ["group_id"], name: "index_board_group_recent_visits_on_group_id", using: :btree
+    t.index ["user_id", "group_id", "board_id"], name: "index_board_group_recent_visits_on_user_group_and_board", unique: true, using: :btree
+    t.index ["user_id"], name: "index_board_group_recent_visits_on_user_id", using: :btree
   end
 
-  add_index "board_group_recent_visits", ["board_id"], name: "index_board_group_recent_visits_on_board_id", using: :btree
-  add_index "board_group_recent_visits", ["group_id"], name: "index_board_group_recent_visits_on_group_id", using: :btree
-  add_index "board_group_recent_visits", ["user_id", "group_id", "board_id"], name: "index_board_group_recent_visits_on_user_group_and_board", unique: true, using: :btree
-  add_index "board_group_recent_visits", ["user_id"], name: "index_board_group_recent_visits_on_user_id", using: :btree
-
   create_table "board_project_recent_visits", id: :bigserial, force: :cascade do |t|
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
     t.integer "user_id"
     t.integer "project_id"
     t.integer "board_id"
+    t.index ["board_id"], name: "index_board_project_recent_visits_on_board_id", using: :btree
+    t.index ["project_id"], name: "index_board_project_recent_visits_on_project_id", using: :btree
+    t.index ["user_id", "project_id", "board_id"], name: "index_board_project_recent_visits_on_user_project_and_board", unique: true, using: :btree
+    t.index ["user_id"], name: "index_board_project_recent_visits_on_user_id", using: :btree
   end
 
-  add_index "board_project_recent_visits", ["board_id"], name: "index_board_project_recent_visits_on_board_id", using: :btree
-  add_index "board_project_recent_visits", ["project_id"], name: "index_board_project_recent_visits_on_project_id", using: :btree
-  add_index "board_project_recent_visits", ["user_id", "project_id", "board_id"], name: "index_board_project_recent_visits_on_user_project_and_board", unique: true, using: :btree
-  add_index "board_project_recent_visits", ["user_id"], name: "index_board_project_recent_visits_on_user_id", using: :btree
-
   create_table "boards", force: :cascade do |t|
     t.integer "project_id"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.integer "group_id"
+    t.index ["group_id"], name: "index_boards_on_group_id", using: :btree
+    t.index ["project_id"], name: "index_boards_on_project_id", using: :btree
   end
 
-  add_index "boards", ["group_id"], name: "index_boards_on_group_id", using: :btree
-  add_index "boards", ["project_id"], name: "index_boards_on_project_id", using: :btree
-
   create_table "broadcast_messages", force: :cascade do |t|
     t.text "message", null: false
     t.datetime "starts_at", null: false
@@ -252,10 +245,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "font"
     t.text "message_html", null: false
     t.integer "cached_markdown_version"
+    t.index ["starts_at", "ends_at", "id"], name: "index_broadcast_messages_on_starts_at_and_ends_at_and_id", using: :btree
   end
 
-  add_index "broadcast_messages", ["starts_at", "ends_at", "id"], name: "index_broadcast_messages_on_starts_at_and_ends_at_and_id", using: :btree
-
   create_table "chat_names", force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "service_id", null: false
@@ -266,51 +258,46 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "last_used_at"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["service_id", "team_id", "chat_id"], name: "index_chat_names_on_service_id_and_team_id_and_chat_id", unique: true, using: :btree
+    t.index ["user_id", "service_id"], name: "index_chat_names_on_user_id_and_service_id", unique: true, using: :btree
   end
 
-  add_index "chat_names", ["service_id", "team_id", "chat_id"], name: "index_chat_names_on_service_id_and_team_id_and_chat_id", unique: true, using: :btree
-  add_index "chat_names", ["user_id", "service_id"], name: "index_chat_names_on_user_id_and_service_id", unique: true, using: :btree
-
   create_table "chat_teams", force: :cascade do |t|
     t.integer "namespace_id", null: false
     t.string "team_id"
     t.string "name"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["namespace_id"], name: "index_chat_teams_on_namespace_id", unique: true, using: :btree
   end
 
-  add_index "chat_teams", ["namespace_id"], name: "index_chat_teams_on_namespace_id", unique: true, using: :btree
-
   create_table "ci_build_trace_chunks", id: :bigserial, force: :cascade do |t|
     t.integer "build_id", null: false
     t.integer "chunk_index", null: false
     t.integer "data_store", null: false
     t.binary "raw_data"
+    t.index ["build_id", "chunk_index"], name: "index_ci_build_trace_chunks_on_build_id_and_chunk_index", unique: true, using: :btree
   end
 
-  add_index "ci_build_trace_chunks", ["build_id", "chunk_index"], name: "index_ci_build_trace_chunks_on_build_id_and_chunk_index", unique: true, using: :btree
-
   create_table "ci_build_trace_section_names", force: :cascade do |t|
     t.integer "project_id", null: false
     t.string "name", null: false
+    t.index ["project_id", "name"], name: "index_ci_build_trace_section_names_on_project_id_and_name", unique: true, using: :btree
   end
 
-  add_index "ci_build_trace_section_names", ["project_id", "name"], name: "index_ci_build_trace_section_names_on_project_id_and_name", unique: true, using: :btree
-
   create_table "ci_build_trace_sections", force: :cascade do |t|
     t.integer "project_id", null: false
     t.datetime_with_timezone "date_start", null: false
     t.datetime_with_timezone "date_end", null: false
-    t.integer "byte_start", limit: 8, null: false
-    t.integer "byte_end", limit: 8, null: false
+    t.bigint "byte_start", null: false
+    t.bigint "byte_end", null: false
     t.integer "build_id", null: false
     t.integer "section_name_id", null: false
+    t.index ["build_id", "section_name_id"], name: "index_ci_build_trace_sections_on_build_id_and_section_name_id", unique: true, using: :btree
+    t.index ["project_id"], name: "index_ci_build_trace_sections_on_project_id", using: :btree
+    t.index ["section_name_id"], name: "index_ci_build_trace_sections_on_section_name_id", using: :btree
   end
 
-  add_index "ci_build_trace_sections", ["build_id", "section_name_id"], name: "index_ci_build_trace_sections_on_build_id_and_section_name_id", unique: true, using: :btree
-  add_index "ci_build_trace_sections", ["project_id"], name: "index_ci_build_trace_sections_on_project_id", using: :btree
-  add_index "ci_build_trace_sections", ["section_name_id"], name: "index_ci_build_trace_sections_on_section_name_id", using: :btree
-
   create_table "ci_builds", force: :cascade do |t|
     t.string "status"
     t.datetime "finished_at"
@@ -341,7 +328,7 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "erased_at"
     t.datetime "artifacts_expire_at"
     t.string "environment"
-    t.integer "artifacts_size", limit: 8
+    t.bigint "artifacts_size"
     t.string "when"
     t.text "yaml_variables"
     t.datetime "queued_at"
@@ -356,45 +343,42 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "protected"
     t.integer "failure_reason"
     t.datetime_with_timezone "scheduled_at"
+    t.index ["artifacts_expire_at"], name: "index_ci_builds_on_artifacts_expire_at", where: "(artifacts_file <> ''::text)", using: :btree
+    t.index ["auto_canceled_by_id"], name: "index_ci_builds_on_auto_canceled_by_id", using: :btree
+    t.index ["commit_id", "stage_idx", "created_at"], name: "index_ci_builds_on_commit_id_and_stage_idx_and_created_at", using: :btree
+    t.index ["commit_id", "status", "type"], name: "index_ci_builds_on_commit_id_and_status_and_type", using: :btree
+    t.index ["commit_id", "type", "name", "ref"], name: "index_ci_builds_on_commit_id_and_type_and_name_and_ref", using: :btree
+    t.index ["commit_id", "type", "ref"], name: "index_ci_builds_on_commit_id_and_type_and_ref", using: :btree
+    t.index ["id"], name: "partial_index_ci_builds_on_id_with_legacy_artifacts", where: "(artifacts_file <> ''::text)", using: :btree
+    t.index ["project_id", "id"], name: "index_ci_builds_on_project_id_and_id", using: :btree
+    t.index ["protected"], name: "index_ci_builds_on_protected", using: :btree
+    t.index ["runner_id"], name: "index_ci_builds_on_runner_id", using: :btree
+    t.index ["scheduled_at"], name: "partial_index_ci_builds_on_scheduled_at_with_scheduled_jobs", where: "((scheduled_at IS NOT NULL) AND ((type)::text = 'Ci::Build'::text) AND ((status)::text = 'scheduled'::text))", using: :btree
+    t.index ["stage_id", "stage_idx"], name: "tmp_build_stage_position_index", where: "(stage_idx IS NOT NULL)", using: :btree
+    t.index ["stage_id"], name: "index_ci_builds_on_stage_id", using: :btree
+    t.index ["status", "type", "runner_id"], name: "index_ci_builds_on_status_and_type_and_runner_id", using: :btree
+    t.index ["token"], name: "index_ci_builds_on_token", unique: true, using: :btree
+    t.index ["updated_at"], name: "index_ci_builds_on_updated_at", using: :btree
+    t.index ["user_id"], name: "index_ci_builds_on_user_id", using: :btree
   end
 
-  add_index "ci_builds", ["artifacts_expire_at"], name: "index_ci_builds_on_artifacts_expire_at", where: "(artifacts_file <> ''::text)", using: :btree
-  add_index "ci_builds", ["auto_canceled_by_id"], name: "index_ci_builds_on_auto_canceled_by_id", using: :btree
-  add_index "ci_builds", ["commit_id", "stage_idx", "created_at"], name: "index_ci_builds_on_commit_id_and_stage_idx_and_created_at", using: :btree
-  add_index "ci_builds", ["commit_id", "status", "type"], name: "index_ci_builds_on_commit_id_and_status_and_type", using: :btree
-  add_index "ci_builds", ["commit_id", "type", "name", "ref"], name: "index_ci_builds_on_commit_id_and_type_and_name_and_ref", using: :btree
-  add_index "ci_builds", ["commit_id", "type", "ref"], name: "index_ci_builds_on_commit_id_and_type_and_ref", using: :btree
-  add_index "ci_builds", ["id"], name: "partial_index_ci_builds_on_id_with_legacy_artifacts", where: "(artifacts_file <> ''::text)", using: :btree
-  add_index "ci_builds", ["project_id", "id"], name: "index_ci_builds_on_project_id_and_id", using: :btree
-  add_index "ci_builds", ["protected"], name: "index_ci_builds_on_protected", using: :btree
-  add_index "ci_builds", ["runner_id"], name: "index_ci_builds_on_runner_id", using: :btree
-  add_index "ci_builds", ["scheduled_at"], name: "partial_index_ci_builds_on_scheduled_at_with_scheduled_jobs", where: "((scheduled_at IS NOT NULL) AND ((type)::text = 'Ci::Build'::text) AND ((status)::text = 'scheduled'::text))", using: :btree
-  add_index "ci_builds", ["stage_id", "stage_idx"], name: "tmp_build_stage_position_index", where: "(stage_idx IS NOT NULL)", using: :btree
-  add_index "ci_builds", ["stage_id"], name: "index_ci_builds_on_stage_id", using: :btree
-  add_index "ci_builds", ["status", "type", "runner_id"], name: "index_ci_builds_on_status_and_type_and_runner_id", using: :btree
-  add_index "ci_builds", ["token"], name: "index_ci_builds_on_token", unique: true, using: :btree
-  add_index "ci_builds", ["updated_at"], name: "index_ci_builds_on_updated_at", using: :btree
-  add_index "ci_builds", ["user_id"], name: "index_ci_builds_on_user_id", using: :btree
-
   create_table "ci_builds_metadata", force: :cascade do |t|
     t.integer "build_id", null: false
     t.integer "project_id", null: false
     t.integer "timeout"
     t.integer "timeout_source", default: 1, null: false
+    t.index ["build_id"], name: "index_ci_builds_metadata_on_build_id", unique: true, using: :btree
+    t.index ["project_id"], name: "index_ci_builds_metadata_on_project_id", using: :btree
   end
 
-  add_index "ci_builds_metadata", ["build_id"], name: "index_ci_builds_metadata_on_build_id", unique: true, using: :btree
-  add_index "ci_builds_metadata", ["project_id"], name: "index_ci_builds_metadata_on_project_id", using: :btree
-
   create_table "ci_builds_runner_session", id: :bigserial, force: :cascade do |t|
     t.integer "build_id", null: false
     t.string "url", null: false
     t.string "certificate"
     t.string "authorization"
+    t.index ["build_id"], name: "index_ci_builds_runner_session_on_build_id", unique: true, using: :btree
   end
 
-  add_index "ci_builds_runner_session", ["build_id"], name: "index_ci_builds_runner_session_on_build_id", unique: true, using: :btree
-
   create_table "ci_group_variables", force: :cascade do |t|
     t.string "key", null: false
     t.text "value"
@@ -405,16 +389,15 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "protected", default: false, null: false
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
+    t.index ["group_id", "key"], name: "index_ci_group_variables_on_group_id_and_key", unique: true, using: :btree
   end
 
-  add_index "ci_group_variables", ["group_id", "key"], name: "index_ci_group_variables_on_group_id_and_key", unique: true, using: :btree
-
   create_table "ci_job_artifacts", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "job_id", null: false
     t.integer "file_type", null: false
     t.integer "file_store"
-    t.integer "size", limit: 8
+    t.bigint "size"
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
     t.datetime_with_timezone "expire_at"
@@ -422,13 +405,12 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.binary "file_sha256"
     t.integer "file_format", limit: 2
     t.integer "file_location", limit: 2
+    t.index ["expire_at", "job_id"], name: "index_ci_job_artifacts_on_expire_at_and_job_id", using: :btree
+    t.index ["file_store"], name: "index_ci_job_artifacts_on_file_store", using: :btree
+    t.index ["job_id", "file_type"], name: "index_ci_job_artifacts_on_job_id_and_file_type", unique: true, using: :btree
+    t.index ["project_id"], name: "index_ci_job_artifacts_on_project_id", using: :btree
   end
 
-  add_index "ci_job_artifacts", ["expire_at", "job_id"], name: "index_ci_job_artifacts_on_expire_at_and_job_id", using: :btree
-  add_index "ci_job_artifacts", ["file_store"], name: "index_ci_job_artifacts_on_file_store", using: :btree
-  add_index "ci_job_artifacts", ["job_id", "file_type"], name: "index_ci_job_artifacts_on_job_id_and_file_type", unique: true, using: :btree
-  add_index "ci_job_artifacts", ["project_id"], name: "index_ci_job_artifacts_on_project_id", using: :btree
-
   create_table "ci_pipeline_schedule_variables", force: :cascade do |t|
     t.string "key", null: false
     t.text "value"
@@ -438,10 +420,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "pipeline_schedule_id", null: false
     t.datetime_with_timezone "created_at"
     t.datetime_with_timezone "updated_at"
+    t.index ["pipeline_schedule_id", "key"], name: "index_ci_pipeline_schedule_variables_on_schedule_id_and_key", unique: true, using: :btree
   end
 
-  add_index "ci_pipeline_schedule_variables", ["pipeline_schedule_id", "key"], name: "index_ci_pipeline_schedule_variables_on_schedule_id_and_key", unique: true, using: :btree
-
   create_table "ci_pipeline_schedules", force: :cascade do |t|
     t.string "description"
     t.string "ref"
@@ -453,11 +434,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "active", default: true
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["next_run_at", "active"], name: "index_ci_pipeline_schedules_on_next_run_at_and_active", using: :btree
+    t.index ["project_id"], name: "index_ci_pipeline_schedules_on_project_id", using: :btree
   end
 
-  add_index "ci_pipeline_schedules", ["next_run_at", "active"], name: "index_ci_pipeline_schedules_on_next_run_at_and_active", using: :btree
-  add_index "ci_pipeline_schedules", ["project_id"], name: "index_ci_pipeline_schedules_on_project_id", using: :btree
-
   create_table "ci_pipeline_variables", force: :cascade do |t|
     t.string "key", null: false
     t.text "value"
@@ -465,10 +445,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "encrypted_value_salt"
     t.string "encrypted_value_iv"
     t.integer "pipeline_id", null: false
+    t.index ["pipeline_id", "key"], name: "index_ci_pipeline_variables_on_pipeline_id_and_key", unique: true, using: :btree
   end
 
-  add_index "ci_pipeline_variables", ["pipeline_id", "key"], name: "index_ci_pipeline_variables_on_pipeline_id_and_key", unique: true, using: :btree
-
   create_table "ci_pipelines", force: :cascade do |t|
     t.string "ref"
     t.string "sha"
@@ -492,37 +471,34 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "protected"
     t.integer "failure_reason"
     t.integer "iid"
+    t.index ["auto_canceled_by_id"], name: "index_ci_pipelines_on_auto_canceled_by_id", using: :btree
+    t.index ["pipeline_schedule_id"], name: "index_ci_pipelines_on_pipeline_schedule_id", using: :btree
+    t.index ["project_id", "iid"], name: "index_ci_pipelines_on_project_id_and_iid", unique: true, where: "(iid IS NOT NULL)", using: :btree
+    t.index ["project_id", "ref", "status", "id"], name: "index_ci_pipelines_on_project_id_and_ref_and_status_and_id", using: :btree
+    t.index ["project_id", "sha"], name: "index_ci_pipelines_on_project_id_and_sha", using: :btree
+    t.index ["project_id", "source"], name: "index_ci_pipelines_on_project_id_and_source", using: :btree
+    t.index ["project_id", "status", "config_source"], name: "index_ci_pipelines_on_project_id_and_status_and_config_source", using: :btree
+    t.index ["project_id"], name: "index_ci_pipelines_on_project_id", using: :btree
+    t.index ["status"], name: "index_ci_pipelines_on_status", using: :btree
+    t.index ["user_id"], name: "index_ci_pipelines_on_user_id", using: :btree
   end
 
-  add_index "ci_pipelines", ["auto_canceled_by_id"], name: "index_ci_pipelines_on_auto_canceled_by_id", using: :btree
-  add_index "ci_pipelines", ["pipeline_schedule_id"], name: "index_ci_pipelines_on_pipeline_schedule_id", using: :btree
-  add_index "ci_pipelines", ["project_id", "iid"], name: "index_ci_pipelines_on_project_id_and_iid", unique: true, where: "(iid IS NOT NULL)", using: :btree
-  add_index "ci_pipelines", ["project_id", "ref", "status", "id"], name: "index_ci_pipelines_on_project_id_and_ref_and_status_and_id", using: :btree
-  add_index "ci_pipelines", ["project_id", "sha"], name: "index_ci_pipelines_on_project_id_and_sha", using: :btree
-  add_index "ci_pipelines", ["project_id", "source"], name: "index_ci_pipelines_on_project_id_and_source", using: :btree
-  add_index "ci_pipelines", ["project_id", "status", "config_source"], name: "index_ci_pipelines_on_project_id_and_status_and_config_source", using: :btree
-  add_index "ci_pipelines", ["project_id"], name: "index_ci_pipelines_on_project_id", using: :btree
-  add_index "ci_pipelines", ["status"], name: "index_ci_pipelines_on_status", using: :btree
-  add_index "ci_pipelines", ["user_id"], name: "index_ci_pipelines_on_user_id", using: :btree
-
   create_table "ci_runner_namespaces", force: :cascade do |t|
     t.integer "runner_id"
     t.integer "namespace_id"
+    t.index ["namespace_id"], name: "index_ci_runner_namespaces_on_namespace_id", using: :btree
+    t.index ["runner_id", "namespace_id"], name: "index_ci_runner_namespaces_on_runner_id_and_namespace_id", unique: true, using: :btree
   end
 
-  add_index "ci_runner_namespaces", ["namespace_id"], name: "index_ci_runner_namespaces_on_namespace_id", using: :btree
-  add_index "ci_runner_namespaces", ["runner_id", "namespace_id"], name: "index_ci_runner_namespaces_on_runner_id_and_namespace_id", unique: true, using: :btree
-
   create_table "ci_runner_projects", force: :cascade do |t|
     t.integer "runner_id", null: false
     t.datetime "created_at"
     t.datetime "updated_at"
     t.integer "project_id"
+    t.index ["project_id"], name: "index_ci_runner_projects_on_project_id", using: :btree
+    t.index ["runner_id"], name: "index_ci_runner_projects_on_runner_id", using: :btree
   end
 
-  add_index "ci_runner_projects", ["project_id"], name: "index_ci_runner_projects_on_project_id", using: :btree
-  add_index "ci_runner_projects", ["runner_id"], name: "index_ci_runner_projects_on_runner_id", using: :btree
-
   create_table "ci_runners", force: :cascade do |t|
     t.string "token"
     t.datetime "created_at"
@@ -542,14 +518,13 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "ip_address"
     t.integer "maximum_timeout"
     t.integer "runner_type", limit: 2, null: false
+    t.index ["contacted_at"], name: "index_ci_runners_on_contacted_at", using: :btree
+    t.index ["is_shared"], name: "index_ci_runners_on_is_shared", using: :btree
+    t.index ["locked"], name: "index_ci_runners_on_locked", using: :btree
+    t.index ["runner_type"], name: "index_ci_runners_on_runner_type", using: :btree
+    t.index ["token"], name: "index_ci_runners_on_token", using: :btree
   end
 
-  add_index "ci_runners", ["contacted_at"], name: "index_ci_runners_on_contacted_at", using: :btree
-  add_index "ci_runners", ["is_shared"], name: "index_ci_runners_on_is_shared", using: :btree
-  add_index "ci_runners", ["locked"], name: "index_ci_runners_on_locked", using: :btree
-  add_index "ci_runners", ["runner_type"], name: "index_ci_runners_on_runner_type", using: :btree
-  add_index "ci_runners", ["token"], name: "index_ci_runners_on_token", using: :btree
-
   create_table "ci_stages", force: :cascade do |t|
     t.integer "project_id"
     t.integer "pipeline_id"
@@ -559,23 +534,21 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "status"
     t.integer "lock_version"
     t.integer "position"
+    t.index ["pipeline_id", "name"], name: "index_ci_stages_on_pipeline_id_and_name", unique: true, using: :btree
+    t.index ["pipeline_id", "position"], name: "index_ci_stages_on_pipeline_id_and_position", using: :btree
+    t.index ["pipeline_id"], name: "index_ci_stages_on_pipeline_id", using: :btree
+    t.index ["project_id"], name: "index_ci_stages_on_project_id", using: :btree
   end
 
-  add_index "ci_stages", ["pipeline_id", "name"], name: "index_ci_stages_on_pipeline_id_and_name", unique: true, using: :btree
-  add_index "ci_stages", ["pipeline_id", "position"], name: "index_ci_stages_on_pipeline_id_and_position", using: :btree
-  add_index "ci_stages", ["pipeline_id"], name: "index_ci_stages_on_pipeline_id", using: :btree
-  add_index "ci_stages", ["project_id"], name: "index_ci_stages_on_project_id", using: :btree
-
   create_table "ci_trigger_requests", force: :cascade do |t|
     t.integer "trigger_id", null: false
     t.text "variables"
     t.datetime "created_at"
     t.datetime "updated_at"
     t.integer "commit_id"
+    t.index ["commit_id"], name: "index_ci_trigger_requests_on_commit_id", using: :btree
   end
 
-  add_index "ci_trigger_requests", ["commit_id"], name: "index_ci_trigger_requests_on_commit_id", using: :btree
-
   create_table "ci_triggers", force: :cascade do |t|
     t.string "token"
     t.datetime "created_at"
@@ -584,10 +557,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "owner_id"
     t.string "description"
     t.string "ref"
+    t.index ["project_id"], name: "index_ci_triggers_on_project_id", using: :btree
   end
 
-  add_index "ci_triggers", ["project_id"], name: "index_ci_triggers_on_project_id", using: :btree
-
   create_table "ci_variables", force: :cascade do |t|
     t.string "key", null: false
     t.text "value"
@@ -597,18 +569,16 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "project_id", null: false
     t.boolean "protected", default: false, null: false
     t.string "environment_scope", default: "*", null: false
+    t.index ["project_id", "key", "environment_scope"], name: "index_ci_variables_on_project_id_and_key_and_environment_scope", unique: true, using: :btree
   end
 
-  add_index "ci_variables", ["project_id", "key", "environment_scope"], name: "index_ci_variables_on_project_id_and_key_and_environment_scope", unique: true, using: :btree
-
   create_table "cluster_groups", force: :cascade do |t|
     t.integer "cluster_id", null: false
     t.integer "group_id", null: false
+    t.index ["cluster_id", "group_id"], name: "index_cluster_groups_on_cluster_id_and_group_id", unique: true, using: :btree
+    t.index ["group_id"], name: "index_cluster_groups_on_group_id", using: :btree
   end
 
-  add_index "cluster_groups", ["cluster_id", "group_id"], name: "index_cluster_groups_on_cluster_id_and_group_id", unique: true, using: :btree
-  add_index "cluster_groups", ["group_id"], name: "index_cluster_groups_on_group_id", using: :btree
-
   create_table "cluster_platforms_kubernetes", force: :cascade do |t|
     t.integer "cluster_id", null: false
     t.datetime_with_timezone "created_at", null: false
@@ -622,20 +592,18 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.text "encrypted_token"
     t.string "encrypted_token_iv"
     t.integer "authorization_type", limit: 2
+    t.index ["cluster_id"], name: "index_cluster_platforms_kubernetes_on_cluster_id", unique: true, using: :btree
   end
 
-  add_index "cluster_platforms_kubernetes", ["cluster_id"], name: "index_cluster_platforms_kubernetes_on_cluster_id", unique: true, using: :btree
-
   create_table "cluster_projects", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "cluster_id", null: false
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
+    t.index ["cluster_id"], name: "index_cluster_projects_on_cluster_id", using: :btree
+    t.index ["project_id"], name: "index_cluster_projects_on_project_id", using: :btree
   end
 
-  add_index "cluster_projects", ["cluster_id"], name: "index_cluster_projects_on_cluster_id", using: :btree
-  add_index "cluster_projects", ["project_id"], name: "index_cluster_projects_on_project_id", using: :btree
-
   create_table "cluster_providers_gcp", force: :cascade do |t|
     t.integer "cluster_id", null: false
     t.integer "status"
@@ -651,10 +619,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.text "encrypted_access_token"
     t.string "encrypted_access_token_iv"
     t.boolean "legacy_abac", default: true, null: false
+    t.index ["cluster_id"], name: "index_cluster_providers_gcp_on_cluster_id", unique: true, using: :btree
   end
 
-  add_index "cluster_providers_gcp", ["cluster_id"], name: "index_cluster_providers_gcp_on_cluster_id", unique: true, using: :btree
-
   create_table "clusters", force: :cascade do |t|
     t.integer "user_id"
     t.integer "provider_type"
@@ -665,11 +632,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "name", null: false
     t.string "environment_scope", default: "*", null: false
     t.integer "cluster_type", limit: 2, default: 3, null: false
+    t.index ["enabled"], name: "index_clusters_on_enabled", using: :btree
+    t.index ["user_id"], name: "index_clusters_on_user_id", using: :btree
   end
 
-  add_index "clusters", ["enabled"], name: "index_clusters_on_enabled", using: :btree
-  add_index "clusters", ["user_id"], name: "index_clusters_on_user_id", using: :btree
-
   create_table "clusters_applications_helm", force: :cascade do |t|
     t.integer "cluster_id", null: false
     t.datetime_with_timezone "created_at", null: false
@@ -733,11 +699,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "version", null: false
     t.text "status_reason"
     t.boolean "privileged", default: true, null: false
+    t.index ["cluster_id"], name: "index_clusters_applications_runners_on_cluster_id", unique: true, using: :btree
+    t.index ["runner_id"], name: "index_clusters_applications_runners_on_runner_id", using: :btree
   end
 
-  add_index "clusters_applications_runners", ["cluster_id"], name: "index_clusters_applications_runners_on_cluster_id", unique: true, using: :btree
-  add_index "clusters_applications_runners", ["runner_id"], name: "index_clusters_applications_runners_on_runner_id", using: :btree
-
   create_table "clusters_kubernetes_namespaces", id: :bigserial, force: :cascade do |t|
     t.integer "cluster_id", null: false
     t.integer "project_id"
@@ -748,23 +713,21 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "encrypted_service_account_token_iv"
     t.string "namespace", null: false
     t.string "service_account_name"
+    t.index ["cluster_id", "namespace"], name: "kubernetes_namespaces_cluster_and_namespace", unique: true, using: :btree
+    t.index ["cluster_id"], name: "index_clusters_kubernetes_namespaces_on_cluster_id", using: :btree
+    t.index ["cluster_project_id"], name: "index_clusters_kubernetes_namespaces_on_cluster_project_id", using: :btree
+    t.index ["project_id"], name: "index_clusters_kubernetes_namespaces_on_project_id", using: :btree
   end
 
-  add_index "clusters_kubernetes_namespaces", ["cluster_id", "namespace"], name: "kubernetes_namespaces_cluster_and_namespace", unique: true, using: :btree
-  add_index "clusters_kubernetes_namespaces", ["cluster_id"], name: "index_clusters_kubernetes_namespaces_on_cluster_id", using: :btree
-  add_index "clusters_kubernetes_namespaces", ["cluster_project_id"], name: "index_clusters_kubernetes_namespaces_on_cluster_project_id", using: :btree
-  add_index "clusters_kubernetes_namespaces", ["project_id"], name: "index_clusters_kubernetes_namespaces_on_project_id", using: :btree
-
   create_table "container_repositories", force: :cascade do |t|
     t.integer "project_id", null: false
     t.string "name", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["project_id", "name"], name: "index_container_repositories_on_project_id_and_name", unique: true, using: :btree
+    t.index ["project_id"], name: "index_container_repositories_on_project_id", using: :btree
   end
 
-  add_index "container_repositories", ["project_id", "name"], name: "index_container_repositories_on_project_id_and_name", unique: true, using: :btree
-  add_index "container_repositories", ["project_id"], name: "index_container_repositories_on_project_id", using: :btree
-
   create_table "conversational_development_index_metrics", force: :cascade do |t|
     t.float "leader_issues", null: false
     t.float "instance_issues", null: false
@@ -806,10 +769,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "created_at"
     t.datetime "updated_at"
     t.boolean "can_push", default: false, null: false
+    t.index ["project_id"], name: "index_deploy_keys_projects_on_project_id", using: :btree
   end
 
-  add_index "deploy_keys_projects", ["project_id"], name: "index_deploy_keys_projects_on_project_id", using: :btree
-
   create_table "deploy_tokens", force: :cascade do |t|
     t.boolean "revoked", default: false
     t.boolean "read_repository", default: false, null: false
@@ -818,11 +780,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime_with_timezone "created_at", null: false
     t.string "name", null: false
     t.string "token", null: false
+    t.index ["token", "expires_at", "id"], name: "index_deploy_tokens_on_token_and_expires_at_and_id", where: "(revoked IS FALSE)", using: :btree
+    t.index ["token"], name: "index_deploy_tokens_on_token", unique: true, using: :btree
   end
 
-  add_index "deploy_tokens", ["token", "expires_at", "id"], name: "index_deploy_tokens_on_token_and_expires_at_and_id", where: "(revoked IS FALSE)", using: :btree
-  add_index "deploy_tokens", ["token"], name: "index_deploy_tokens_on_token", unique: true, using: :btree
-
   create_table "deployments", force: :cascade do |t|
     t.integer "iid", null: false
     t.integer "project_id", null: false
@@ -838,18 +799,17 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "on_stop"
     t.integer "status", limit: 2, default: 2, null: false
     t.datetime_with_timezone "finished_at"
+    t.index ["created_at"], name: "index_deployments_on_created_at", using: :btree
+    t.index ["deployable_type", "deployable_id"], name: "index_deployments_on_deployable_type_and_deployable_id", using: :btree
+    t.index ["environment_id", "id"], name: "index_deployments_on_environment_id_and_id", using: :btree
+    t.index ["environment_id", "iid", "project_id"], name: "index_deployments_on_environment_id_and_iid_and_project_id", using: :btree
+    t.index ["environment_id", "status"], name: "index_deployments_on_environment_id_and_status", using: :btree
+    t.index ["id"], name: "partial_index_deployments_for_legacy_successful_deployments", where: "((finished_at IS NULL) AND (status = 2))", using: :btree
+    t.index ["project_id", "iid"], name: "index_deployments_on_project_id_and_iid", unique: true, using: :btree
+    t.index ["project_id", "status", "created_at"], name: "index_deployments_on_project_id_and_status_and_created_at", using: :btree
+    t.index ["project_id", "status"], name: "index_deployments_on_project_id_and_status", using: :btree
   end
 
-  add_index "deployments", ["created_at"], name: "index_deployments_on_created_at", using: :btree
-  add_index "deployments", ["deployable_type", "deployable_id"], name: "index_deployments_on_deployable_type_and_deployable_id", using: :btree
-  add_index "deployments", ["environment_id", "id"], name: "index_deployments_on_environment_id_and_id", using: :btree
-  add_index "deployments", ["environment_id", "iid", "project_id"], name: "index_deployments_on_environment_id_and_iid_and_project_id", using: :btree
-  add_index "deployments", ["environment_id", "status"], name: "index_deployments_on_environment_id_and_status", using: :btree
-  add_index "deployments", ["id"], name: "partial_index_deployments_for_legacy_successful_deployments", where: "((finished_at IS NULL) AND (status = 2))", using: :btree
-  add_index "deployments", ["project_id", "iid"], name: "index_deployments_on_project_id_and_iid", unique: true, using: :btree
-  add_index "deployments", ["project_id", "status", "created_at"], name: "index_deployments_on_project_id_and_status_and_created_at", using: :btree
-  add_index "deployments", ["project_id", "status"], name: "index_deployments_on_project_id_and_status", using: :btree
-
   create_table "emails", force: :cascade do |t|
     t.integer "user_id", null: false
     t.string "email", null: false
@@ -858,12 +818,11 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "confirmation_token"
     t.datetime_with_timezone "confirmed_at"
     t.datetime_with_timezone "confirmation_sent_at"
+    t.index ["confirmation_token"], name: "index_emails_on_confirmation_token", unique: true, using: :btree
+    t.index ["email"], name: "index_emails_on_email", unique: true, using: :btree
+    t.index ["user_id"], name: "index_emails_on_user_id", using: :btree
   end
 
-  add_index "emails", ["confirmation_token"], name: "index_emails_on_confirmation_token", unique: true, using: :btree
-  add_index "emails", ["email"], name: "index_emails_on_email", unique: true, using: :btree
-  add_index "emails", ["user_id"], name: "index_emails_on_user_id", using: :btree
-
   create_table "environments", force: :cascade do |t|
     t.integer "project_id", null: false
     t.string "name", null: false
@@ -873,11 +832,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "environment_type"
     t.string "state", default: "available", null: false
     t.string "slug", null: false
+    t.index ["project_id", "name"], name: "index_environments_on_project_id_and_name", unique: true, using: :btree
+    t.index ["project_id", "slug"], name: "index_environments_on_project_id_and_slug", unique: true, using: :btree
   end
 
-  add_index "environments", ["project_id", "name"], name: "index_environments_on_project_id_and_name", unique: true, using: :btree
-  add_index "environments", ["project_id", "slug"], name: "index_environments_on_project_id_and_slug", unique: true, using: :btree
-
   create_table "events", force: :cascade do |t|
     t.integer "project_id"
     t.integer "author_id", null: false
@@ -886,66 +844,59 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime_with_timezone "updated_at", null: false
     t.integer "action", limit: 2, null: false
     t.string "target_type"
+    t.index ["action"], name: "index_events_on_action", using: :btree
+    t.index ["author_id", "project_id"], name: "index_events_on_author_id_and_project_id", using: :btree
+    t.index ["project_id", "id"], name: "index_events_on_project_id_and_id", using: :btree
+    t.index ["target_type", "target_id"], name: "index_events_on_target_type_and_target_id", using: :btree
   end
 
-  add_index "events", ["action"], name: "index_events_on_action", using: :btree
-  add_index "events", ["author_id", "project_id"], name: "index_events_on_author_id_and_project_id", using: :btree
-  add_index "events", ["project_id", "id"], name: "index_events_on_project_id_and_id", using: :btree
-  add_index "events", ["target_type", "target_id"], name: "index_events_on_target_type_and_target_id", using: :btree
-
   create_table "feature_gates", force: :cascade do |t|
     t.string "feature_key", null: false
     t.string "key", null: false
     t.string "value"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["feature_key", "key", "value"], name: "index_feature_gates_on_feature_key_and_key_and_value", unique: true, using: :btree
   end
 
-  add_index "feature_gates", ["feature_key", "key", "value"], name: "index_feature_gates_on_feature_key_and_key_and_value", unique: true, using: :btree
-
   create_table "features", force: :cascade do |t|
     t.string "key", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["key"], name: "index_features_on_key", unique: true, using: :btree
   end
 
-  add_index "features", ["key"], name: "index_features_on_key", unique: true, using: :btree
-
   create_table "fork_network_members", force: :cascade do |t|
     t.integer "fork_network_id", null: false
     t.integer "project_id", null: false
     t.integer "forked_from_project_id"
+    t.index ["fork_network_id"], name: "index_fork_network_members_on_fork_network_id", using: :btree
+    t.index ["project_id"], name: "index_fork_network_members_on_project_id", unique: true, using: :btree
   end
 
-  add_index "fork_network_members", ["fork_network_id"], name: "index_fork_network_members_on_fork_network_id", using: :btree
-  add_index "fork_network_members", ["project_id"], name: "index_fork_network_members_on_project_id", unique: true, using: :btree
-
   create_table "fork_networks", force: :cascade do |t|
     t.integer "root_project_id"
     t.string "deleted_root_project_name"
+    t.index ["root_project_id"], name: "index_fork_networks_on_root_project_id", unique: true, using: :btree
   end
 
-  add_index "fork_networks", ["root_project_id"], name: "index_fork_networks_on_root_project_id", unique: true, using: :btree
-
   create_table "forked_project_links", force: :cascade do |t|
     t.integer "forked_to_project_id", null: false
     t.integer "forked_from_project_id", null: false
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["forked_to_project_id"], name: "index_forked_project_links_on_forked_to_project_id", unique: true, using: :btree
   end
 
-  add_index "forked_project_links", ["forked_to_project_id"], name: "index_forked_project_links_on_forked_to_project_id", unique: true, using: :btree
-
   create_table "gpg_key_subkeys", force: :cascade do |t|
     t.integer "gpg_key_id", null: false
     t.binary "keyid"
     t.binary "fingerprint"
+    t.index ["fingerprint"], name: "index_gpg_key_subkeys_on_fingerprint", unique: true, using: :btree
+    t.index ["gpg_key_id"], name: "index_gpg_key_subkeys_on_gpg_key_id", using: :btree
+    t.index ["keyid"], name: "index_gpg_key_subkeys_on_keyid", unique: true, using: :btree
   end
 
-  add_index "gpg_key_subkeys", ["fingerprint"], name: "index_gpg_key_subkeys_on_fingerprint", unique: true, using: :btree
-  add_index "gpg_key_subkeys", ["gpg_key_id"], name: "index_gpg_key_subkeys_on_gpg_key_id", using: :btree
-  add_index "gpg_key_subkeys", ["keyid"], name: "index_gpg_key_subkeys_on_keyid", unique: true, using: :btree
-
   create_table "gpg_keys", force: :cascade do |t|
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
@@ -953,12 +904,11 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.binary "primary_keyid"
     t.binary "fingerprint"
     t.text "key"
+    t.index ["fingerprint"], name: "index_gpg_keys_on_fingerprint", unique: true, using: :btree
+    t.index ["primary_keyid"], name: "index_gpg_keys_on_primary_keyid", unique: true, using: :btree
+    t.index ["user_id"], name: "index_gpg_keys_on_user_id", using: :btree
   end
 
-  add_index "gpg_keys", ["fingerprint"], name: "index_gpg_keys_on_fingerprint", unique: true, using: :btree
-  add_index "gpg_keys", ["primary_keyid"], name: "index_gpg_keys_on_primary_keyid", unique: true, using: :btree
-  add_index "gpg_keys", ["user_id"], name: "index_gpg_keys_on_user_id", using: :btree
-
   create_table "gpg_signatures", force: :cascade do |t|
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
@@ -970,63 +920,57 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.text "gpg_key_user_email"
     t.integer "verification_status", limit: 2, default: 0, null: false
     t.integer "gpg_key_subkey_id"
+    t.index ["commit_sha"], name: "index_gpg_signatures_on_commit_sha", unique: true, using: :btree
+    t.index ["gpg_key_id"], name: "index_gpg_signatures_on_gpg_key_id", using: :btree
+    t.index ["gpg_key_primary_keyid"], name: "index_gpg_signatures_on_gpg_key_primary_keyid", using: :btree
+    t.index ["gpg_key_subkey_id"], name: "index_gpg_signatures_on_gpg_key_subkey_id", using: :btree
+    t.index ["project_id"], name: "index_gpg_signatures_on_project_id", using: :btree
   end
 
-  add_index "gpg_signatures", ["commit_sha"], name: "index_gpg_signatures_on_commit_sha", unique: true, using: :btree
-  add_index "gpg_signatures", ["gpg_key_id"], name: "index_gpg_signatures_on_gpg_key_id", using: :btree
-  add_index "gpg_signatures", ["gpg_key_primary_keyid"], name: "index_gpg_signatures_on_gpg_key_primary_keyid", using: :btree
-  add_index "gpg_signatures", ["gpg_key_subkey_id"], name: "index_gpg_signatures_on_gpg_key_subkey_id", using: :btree
-  add_index "gpg_signatures", ["project_id"], name: "index_gpg_signatures_on_project_id", using: :btree
-
   create_table "group_custom_attributes", force: :cascade do |t|
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
     t.integer "group_id", null: false
     t.string "key", null: false
     t.string "value", null: false
+    t.index ["group_id", "key"], name: "index_group_custom_attributes_on_group_id_and_key", unique: true, using: :btree
+    t.index ["key", "value"], name: "index_group_custom_attributes_on_key_and_value", using: :btree
   end
 
-  add_index "group_custom_attributes", ["group_id", "key"], name: "index_group_custom_attributes_on_group_id_and_key", unique: true, using: :btree
-  add_index "group_custom_attributes", ["key", "value"], name: "index_group_custom_attributes_on_key_and_value", using: :btree
-
   create_table "identities", force: :cascade do |t|
     t.string "extern_uid"
     t.string "provider"
     t.integer "user_id"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["user_id"], name: "index_identities_on_user_id", using: :btree
   end
 
-  add_index "identities", ["user_id"], name: "index_identities_on_user_id", using: :btree
-
   create_table "import_export_uploads", force: :cascade do |t|
     t.datetime_with_timezone "updated_at", null: false
     t.integer "project_id"
     t.text "import_file"
     t.text "export_file"
+    t.index ["project_id"], name: "index_import_export_uploads_on_project_id", using: :btree
+    t.index ["updated_at"], name: "index_import_export_uploads_on_updated_at", using: :btree
   end
 
-  add_index "import_export_uploads", ["project_id"], name: "index_import_export_uploads_on_project_id", using: :btree
-  add_index "import_export_uploads", ["updated_at"], name: "index_import_export_uploads_on_updated_at", using: :btree
-
   create_table "internal_ids", id: :bigserial, force: :cascade do |t|
     t.integer "project_id"
     t.integer "usage", null: false
     t.integer "last_value", null: false
     t.integer "namespace_id"
+    t.index ["usage", "namespace_id"], name: "index_internal_ids_on_usage_and_namespace_id", unique: true, where: "(namespace_id IS NOT NULL)", using: :btree
+    t.index ["usage", "project_id"], name: "index_internal_ids_on_usage_and_project_id", unique: true, where: "(project_id IS NOT NULL)", using: :btree
   end
 
-  add_index "internal_ids", ["usage", "namespace_id"], name: "index_internal_ids_on_usage_and_namespace_id", unique: true, where: "(namespace_id IS NOT NULL)", using: :btree
-  add_index "internal_ids", ["usage", "project_id"], name: "index_internal_ids_on_usage_and_project_id", unique: true, where: "(project_id IS NOT NULL)", using: :btree
-
   create_table "issue_assignees", id: false, force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "issue_id", null: false
+    t.index ["issue_id", "user_id"], name: "index_issue_assignees_on_issue_id_and_user_id", unique: true, using: :btree
+    t.index ["user_id"], name: "index_issue_assignees_on_user_id", using: :btree
   end
 
-  add_index "issue_assignees", ["issue_id", "user_id"], name: "index_issue_assignees_on_issue_id_and_user_id", unique: true, using: :btree
-  add_index "issue_assignees", ["user_id"], name: "index_issue_assignees_on_user_id", using: :btree
-
   create_table "issue_metrics", force: :cascade do |t|
     t.integer "issue_id", null: false
     t.datetime "first_mentioned_in_commit_at"
@@ -1034,10 +978,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "first_added_to_board_at"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["issue_id"], name: "index_issue_metrics", using: :btree
   end
 
-  add_index "issue_metrics", ["issue_id"], name: "index_issue_metrics", using: :btree
-
   create_table "issues", force: :cascade do |t|
     t.string "title"
     t.integer "author_id"
@@ -1063,23 +1006,22 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "discussion_locked"
     t.datetime_with_timezone "closed_at"
     t.integer "closed_by_id"
+    t.index ["author_id"], name: "index_issues_on_author_id", using: :btree
+    t.index ["confidential"], name: "index_issues_on_confidential", using: :btree
+    t.index ["description"], name: "index_issues_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"}
+    t.index ["milestone_id"], name: "index_issues_on_milestone_id", using: :btree
+    t.index ["moved_to_id"], name: "index_issues_on_moved_to_id", where: "(moved_to_id IS NOT NULL)", using: :btree
+    t.index ["project_id", "created_at", "id", "state"], name: "index_issues_on_project_id_and_created_at_and_id_and_state", using: :btree
+    t.index ["project_id", "due_date", "id", "state"], name: "idx_issues_on_project_id_and_due_date_and_id_and_state_partial", where: "(due_date IS NOT NULL)", using: :btree
+    t.index ["project_id", "iid"], name: "index_issues_on_project_id_and_iid", unique: true, using: :btree
+    t.index ["project_id", "updated_at", "id", "state"], name: "index_issues_on_project_id_and_updated_at_and_id_and_state", using: :btree
+    t.index ["relative_position"], name: "index_issues_on_relative_position", using: :btree
+    t.index ["state"], name: "index_issues_on_state", using: :btree
+    t.index ["title"], name: "index_issues_on_title_trigram", using: :gin, opclasses: {"title"=>"gin_trgm_ops"}
+    t.index ["updated_at"], name: "index_issues_on_updated_at", using: :btree
+    t.index ["updated_by_id"], name: "index_issues_on_updated_by_id", where: "(updated_by_id IS NOT NULL)", using: :btree
   end
 
-  add_index "issues", ["author_id"], name: "index_issues_on_author_id", using: :btree
-  add_index "issues", ["confidential"], name: "index_issues_on_confidential", using: :btree
-  add_index "issues", ["description"], name: "index_issues_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"}
-  add_index "issues", ["milestone_id"], name: "index_issues_on_milestone_id", using: :btree
-  add_index "issues", ["moved_to_id"], name: "index_issues_on_moved_to_id", where: "(moved_to_id IS NOT NULL)", using: :btree
-  add_index "issues", ["project_id", "created_at", "id", "state"], name: "index_issues_on_project_id_and_created_at_and_id_and_state", using: :btree
-  add_index "issues", ["project_id", "due_date", "id", "state"], name: "idx_issues_on_project_id_and_due_date_and_id_and_state_partial", where: "(due_date IS NOT NULL)", using: :btree
-  add_index "issues", ["project_id", "iid"], name: "index_issues_on_project_id_and_iid", unique: true, using: :btree
-  add_index "issues", ["project_id", "updated_at", "id", "state"], name: "index_issues_on_project_id_and_updated_at_and_id_and_state", using: :btree
-  add_index "issues", ["relative_position"], name: "index_issues_on_relative_position", using: :btree
-  add_index "issues", ["state"], name: "index_issues_on_state", using: :btree
-  add_index "issues", ["title"], name: "index_issues_on_title_trigram", using: :gin, opclasses: {"title"=>"gin_trgm_ops"}
-  add_index "issues", ["updated_at"], name: "index_issues_on_updated_at", using: :btree
-  add_index "issues", ["updated_by_id"], name: "index_issues_on_updated_by_id", where: "(updated_by_id IS NOT NULL)", using: :btree
-
   create_table "keys", force: :cascade do |t|
     t.integer "user_id"
     t.datetime "created_at"
@@ -1090,33 +1032,30 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "fingerprint"
     t.boolean "public", default: false, null: false
     t.datetime "last_used_at"
+    t.index ["fingerprint"], name: "index_keys_on_fingerprint", unique: true, using: :btree
+    t.index ["user_id"], name: "index_keys_on_user_id", using: :btree
   end
 
-  add_index "keys", ["fingerprint"], name: "index_keys_on_fingerprint", unique: true, using: :btree
-  add_index "keys", ["user_id"], name: "index_keys_on_user_id", using: :btree
-
   create_table "label_links", force: :cascade do |t|
     t.integer "label_id"
     t.integer "target_id"
     t.string "target_type"
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["label_id"], name: "index_label_links_on_label_id", using: :btree
+    t.index ["target_id", "target_type"], name: "index_label_links_on_target_id_and_target_type", using: :btree
   end
 
-  add_index "label_links", ["label_id"], name: "index_label_links_on_label_id", using: :btree
-  add_index "label_links", ["target_id", "target_type"], name: "index_label_links_on_target_id_and_target_type", using: :btree
-
   create_table "label_priorities", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "label_id", null: false
     t.integer "priority", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["priority"], name: "index_label_priorities_on_priority", using: :btree
+    t.index ["project_id", "label_id"], name: "index_label_priorities_on_project_id_and_label_id", unique: true, using: :btree
   end
 
-  add_index "label_priorities", ["priority"], name: "index_label_priorities_on_priority", using: :btree
-  add_index "label_priorities", ["project_id", "label_id"], name: "index_label_priorities_on_project_id_and_label_id", unique: true, using: :btree
-
   create_table "labels", force: :cascade do |t|
     t.string "title"
     t.string "color"
@@ -1129,45 +1068,41 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "type"
     t.integer "group_id"
     t.integer "cached_markdown_version"
+    t.index ["group_id", "project_id", "title"], name: "index_labels_on_group_id_and_project_id_and_title", unique: true, using: :btree
+    t.index ["project_id"], name: "index_labels_on_project_id", using: :btree
+    t.index ["template"], name: "index_labels_on_template", where: "template", using: :btree
+    t.index ["title"], name: "index_labels_on_title", using: :btree
+    t.index ["type", "project_id"], name: "index_labels_on_type_and_project_id", using: :btree
   end
 
-  add_index "labels", ["group_id", "project_id", "title"], name: "index_labels_on_group_id_and_project_id_and_title", unique: true, using: :btree
-  add_index "labels", ["project_id"], name: "index_labels_on_project_id", using: :btree
-  add_index "labels", ["template"], name: "index_labels_on_template", where: "template", using: :btree
-  add_index "labels", ["title"], name: "index_labels_on_title", using: :btree
-  add_index "labels", ["type", "project_id"], name: "index_labels_on_type_and_project_id", using: :btree
-
   create_table "lfs_file_locks", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "user_id", null: false
     t.datetime "created_at", null: false
     t.string "path", limit: 511
+    t.index ["project_id", "path"], name: "index_lfs_file_locks_on_project_id_and_path", unique: true, using: :btree
+    t.index ["user_id"], name: "index_lfs_file_locks_on_user_id", using: :btree
   end
 
-  add_index "lfs_file_locks", ["project_id", "path"], name: "index_lfs_file_locks_on_project_id_and_path", unique: true, using: :btree
-  add_index "lfs_file_locks", ["user_id"], name: "index_lfs_file_locks_on_user_id", using: :btree
-
   create_table "lfs_objects", force: :cascade do |t|
     t.string "oid", null: false
-    t.integer "size", limit: 8, null: false
+    t.bigint "size", null: false
     t.datetime "created_at"
     t.datetime "updated_at"
     t.string "file"
     t.integer "file_store"
+    t.index ["file_store"], name: "index_lfs_objects_on_file_store", using: :btree
+    t.index ["oid"], name: "index_lfs_objects_on_oid", unique: true, using: :btree
   end
 
-  add_index "lfs_objects", ["file_store"], name: "index_lfs_objects_on_file_store", using: :btree
-  add_index "lfs_objects", ["oid"], name: "index_lfs_objects_on_oid", unique: true, using: :btree
-
   create_table "lfs_objects_projects", force: :cascade do |t|
     t.integer "lfs_object_id", null: false
     t.integer "project_id", null: false
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["project_id"], name: "index_lfs_objects_projects_on_project_id", using: :btree
   end
 
-  add_index "lfs_objects_projects", ["project_id"], name: "index_lfs_objects_projects_on_project_id", using: :btree
-
   create_table "lists", force: :cascade do |t|
     t.integer "board_id", null: false
     t.integer "label_id"
@@ -1175,12 +1110,11 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "position"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["board_id", "label_id"], name: "index_lists_on_board_id_and_label_id", unique: true, using: :btree
+    t.index ["label_id"], name: "index_lists_on_label_id", using: :btree
+    t.index ["list_type"], name: "index_lists_on_list_type", using: :btree
   end
 
-  add_index "lists", ["board_id", "label_id"], name: "index_lists_on_board_id_and_label_id", unique: true, using: :btree
-  add_index "lists", ["label_id"], name: "index_lists_on_label_id", using: :btree
-  add_index "lists", ["list_type"], name: "index_lists_on_list_type", using: :btree
-
   create_table "members", force: :cascade do |t|
     t.integer "access_level", null: false
     t.integer "source_id", null: false
@@ -1196,14 +1130,13 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "invite_accepted_at"
     t.datetime "requested_at"
     t.date "expires_at"
+    t.index ["access_level"], name: "index_members_on_access_level", using: :btree
+    t.index ["invite_token"], name: "index_members_on_invite_token", unique: true, using: :btree
+    t.index ["requested_at"], name: "index_members_on_requested_at", using: :btree
+    t.index ["source_id", "source_type"], name: "index_members_on_source_id_and_source_type", using: :btree
+    t.index ["user_id"], name: "index_members_on_user_id", using: :btree
   end
 
-  add_index "members", ["access_level"], name: "index_members_on_access_level", using: :btree
-  add_index "members", ["invite_token"], name: "index_members_on_invite_token", unique: true, using: :btree
-  add_index "members", ["requested_at"], name: "index_members_on_requested_at", using: :btree
-  add_index "members", ["source_id", "source_type"], name: "index_members_on_source_id_and_source_type", using: :btree
-  add_index "members", ["user_id"], name: "index_members_on_user_id", using: :btree
-
   create_table "merge_request_diff_commits", id: false, force: :cascade do |t|
     t.datetime_with_timezone "authored_date"
     t.datetime_with_timezone "committed_date"
@@ -1215,11 +1148,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.text "committer_name"
     t.text "committer_email"
     t.text "message"
+    t.index ["merge_request_diff_id", "relative_order"], name: "index_merge_request_diff_commits_on_mr_diff_id_and_order", unique: true, using: :btree
+    t.index ["sha"], name: "index_merge_request_diff_commits_on_sha", using: :btree
   end
 
-  add_index "merge_request_diff_commits", ["merge_request_diff_id", "relative_order"], name: "index_merge_request_diff_commits_on_mr_diff_id_and_order", unique: true, using: :btree
-  add_index "merge_request_diff_commits", ["sha"], name: "index_merge_request_diff_commits_on_sha", using: :btree
-
   create_table "merge_request_diff_files", id: false, force: :cascade do |t|
     t.integer "merge_request_diff_id", null: false
     t.integer "relative_order", null: false
@@ -1233,10 +1165,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.text "old_path", null: false
     t.text "diff", null: false
     t.boolean "binary"
+    t.index ["merge_request_diff_id", "relative_order"], name: "index_merge_request_diff_files_on_mr_diff_id_and_order", unique: true, using: :btree
   end
 
-  add_index "merge_request_diff_files", ["merge_request_diff_id", "relative_order"], name: "index_merge_request_diff_files_on_mr_diff_id_and_order", unique: true, using: :btree
-
   create_table "merge_request_diffs", force: :cascade do |t|
     t.string "state"
     t.integer "merge_request_id", null: false
@@ -1247,10 +1178,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "head_commit_sha"
     t.string "start_commit_sha"
     t.integer "commits_count"
+    t.index ["merge_request_id", "id"], name: "index_merge_request_diffs_on_merge_request_id_and_id", using: :btree
   end
 
-  add_index "merge_request_diffs", ["merge_request_id", "id"], name: "index_merge_request_diffs_on_merge_request_id_and_id", using: :btree
-
   create_table "merge_request_metrics", force: :cascade do |t|
     t.integer "merge_request_id", null: false
     t.datetime "latest_build_started_at"
@@ -1263,12 +1193,11 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "merged_by_id"
     t.integer "latest_closed_by_id"
     t.datetime_with_timezone "latest_closed_at"
+    t.index ["first_deployed_to_production_at"], name: "index_merge_request_metrics_on_first_deployed_to_production_at", using: :btree
+    t.index ["merge_request_id"], name: "index_merge_request_metrics", using: :btree
+    t.index ["pipeline_id"], name: "index_merge_request_metrics_on_pipeline_id", using: :btree
   end
 
-  add_index "merge_request_metrics", ["first_deployed_to_production_at"], name: "index_merge_request_metrics_on_first_deployed_to_production_at", using: :btree
-  add_index "merge_request_metrics", ["merge_request_id"], name: "index_merge_request_metrics", using: :btree
-  add_index "merge_request_metrics", ["pipeline_id"], name: "index_merge_request_metrics_on_pipeline_id", using: :btree
-
   create_table "merge_requests", force: :cascade do |t|
     t.string "target_branch", null: false
     t.string "source_branch", null: false
@@ -1305,38 +1234,36 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "rebase_commit_sha"
     t.boolean "squash", default: false, null: false
     t.boolean "allow_maintainer_to_push"
+    t.index ["assignee_id"], name: "index_merge_requests_on_assignee_id", using: :btree
+    t.index ["author_id"], name: "index_merge_requests_on_author_id", using: :btree
+    t.index ["created_at"], name: "index_merge_requests_on_created_at", using: :btree
+    t.index ["description"], name: "index_merge_requests_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"}
+    t.index ["head_pipeline_id"], name: "index_merge_requests_on_head_pipeline_id", using: :btree
+    t.index ["id", "merge_jid"], name: "index_merge_requests_on_id_and_merge_jid", where: "((merge_jid IS NOT NULL) AND ((state)::text = 'locked'::text))", using: :btree
+    t.index ["latest_merge_request_diff_id"], name: "index_merge_requests_on_latest_merge_request_diff_id", using: :btree
+    t.index ["merge_user_id"], name: "index_merge_requests_on_merge_user_id", where: "(merge_user_id IS NOT NULL)", using: :btree
+    t.index ["milestone_id"], name: "index_merge_requests_on_milestone_id", using: :btree
+    t.index ["source_branch"], name: "index_merge_requests_on_source_branch", using: :btree
+    t.index ["source_project_id", "source_branch"], name: "index_merge_requests_on_source_project_and_branch_state_opened", where: "((state)::text = 'opened'::text)", using: :btree
+    t.index ["source_project_id", "source_branch"], name: "index_merge_requests_on_source_project_id_and_source_branch", using: :btree
+    t.index ["target_branch"], name: "index_merge_requests_on_target_branch", using: :btree
+    t.index ["target_project_id", "iid"], name: "index_merge_requests_on_target_project_id_and_iid", unique: true, using: :btree
+    t.index ["target_project_id", "iid"], name: "index_merge_requests_on_target_project_id_and_iid_opened", where: "((state)::text = 'opened'::text)", using: :btree
+    t.index ["target_project_id", "merge_commit_sha", "id"], name: "index_merge_requests_on_tp_id_and_merge_commit_sha_and_id", using: :btree
+    t.index ["title"], name: "index_merge_requests_on_title", using: :btree
+    t.index ["title"], name: "index_merge_requests_on_title_trigram", using: :gin, opclasses: {"title"=>"gin_trgm_ops"}
+    t.index ["updated_by_id"], name: "index_merge_requests_on_updated_by_id", where: "(updated_by_id IS NOT NULL)", using: :btree
   end
 
-  add_index "merge_requests", ["assignee_id"], name: "index_merge_requests_on_assignee_id", using: :btree
-  add_index "merge_requests", ["author_id"], name: "index_merge_requests_on_author_id", using: :btree
-  add_index "merge_requests", ["created_at"], name: "index_merge_requests_on_created_at", using: :btree
-  add_index "merge_requests", ["description"], name: "index_merge_requests_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"}
-  add_index "merge_requests", ["head_pipeline_id"], name: "index_merge_requests_on_head_pipeline_id", using: :btree
-  add_index "merge_requests", ["id", "merge_jid"], name: "index_merge_requests_on_id_and_merge_jid", where: "((merge_jid IS NOT NULL) AND ((state)::text = 'locked'::text))", using: :btree
-  add_index "merge_requests", ["latest_merge_request_diff_id"], name: "index_merge_requests_on_latest_merge_request_diff_id", using: :btree
-  add_index "merge_requests", ["merge_user_id"], name: "index_merge_requests_on_merge_user_id", where: "(merge_user_id IS NOT NULL)", using: :btree
-  add_index "merge_requests", ["milestone_id"], name: "index_merge_requests_on_milestone_id", using: :btree
-  add_index "merge_requests", ["source_branch"], name: "index_merge_requests_on_source_branch", using: :btree
-  add_index "merge_requests", ["source_project_id", "source_branch"], name: "index_merge_requests_on_source_project_and_branch_state_opened", where: "((state)::text = 'opened'::text)", using: :btree
-  add_index "merge_requests", ["source_project_id", "source_branch"], name: "index_merge_requests_on_source_project_id_and_source_branch", using: :btree
-  add_index "merge_requests", ["target_branch"], name: "index_merge_requests_on_target_branch", using: :btree
-  add_index "merge_requests", ["target_project_id", "iid"], name: "index_merge_requests_on_target_project_id_and_iid", unique: true, using: :btree
-  add_index "merge_requests", ["target_project_id", "iid"], name: "index_merge_requests_on_target_project_id_and_iid_opened", where: "((state)::text = 'opened'::text)", using: :btree
-  add_index "merge_requests", ["target_project_id", "merge_commit_sha", "id"], name: "index_merge_requests_on_tp_id_and_merge_commit_sha_and_id", using: :btree
-  add_index "merge_requests", ["title"], name: "index_merge_requests_on_title", using: :btree
-  add_index "merge_requests", ["title"], name: "index_merge_requests_on_title_trigram", using: :gin, opclasses: {"title"=>"gin_trgm_ops"}
-  add_index "merge_requests", ["updated_by_id"], name: "index_merge_requests_on_updated_by_id", where: "(updated_by_id IS NOT NULL)", using: :btree
-
   create_table "merge_requests_closing_issues", force: :cascade do |t|
     t.integer "merge_request_id", null: false
     t.integer "issue_id", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["issue_id"], name: "index_merge_requests_closing_issues_on_issue_id", using: :btree
+    t.index ["merge_request_id"], name: "index_merge_requests_closing_issues_on_merge_request_id", using: :btree
   end
 
-  add_index "merge_requests_closing_issues", ["issue_id"], name: "index_merge_requests_closing_issues_on_issue_id", using: :btree
-  add_index "merge_requests_closing_issues", ["merge_request_id"], name: "index_merge_requests_closing_issues_on_merge_request_id", using: :btree
-
   create_table "milestones", force: :cascade do |t|
     t.string "title", null: false
     t.integer "project_id"
@@ -1351,15 +1278,14 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.date "start_date"
     t.integer "cached_markdown_version"
     t.integer "group_id"
+    t.index ["description"], name: "index_milestones_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"}
+    t.index ["due_date"], name: "index_milestones_on_due_date", using: :btree
+    t.index ["group_id"], name: "index_milestones_on_group_id", using: :btree
+    t.index ["project_id", "iid"], name: "index_milestones_on_project_id_and_iid", unique: true, using: :btree
+    t.index ["title"], name: "index_milestones_on_title", using: :btree
+    t.index ["title"], name: "index_milestones_on_title_trigram", using: :gin, opclasses: {"title"=>"gin_trgm_ops"}
   end
 
-  add_index "milestones", ["description"], name: "index_milestones_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"}
-  add_index "milestones", ["due_date"], name: "index_milestones_on_due_date", using: :btree
-  add_index "milestones", ["group_id"], name: "index_milestones_on_group_id", using: :btree
-  add_index "milestones", ["project_id", "iid"], name: "index_milestones_on_project_id_and_iid", unique: true, using: :btree
-  add_index "milestones", ["title"], name: "index_milestones_on_title", using: :btree
-  add_index "milestones", ["title"], name: "index_milestones_on_title_trigram", using: :gin, opclasses: {"title"=>"gin_trgm_ops"}
-
   create_table "namespaces", force: :cascade do |t|
     t.string "name", null: false
     t.string "path", null: false
@@ -1379,19 +1305,18 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "two_factor_grace_period", default: 48, null: false
     t.integer "cached_markdown_version"
     t.string "runners_token"
+    t.index ["created_at"], name: "index_namespaces_on_created_at", using: :btree
+    t.index ["name", "parent_id"], name: "index_namespaces_on_name_and_parent_id", unique: true, using: :btree
+    t.index ["name"], name: "index_namespaces_on_name_trigram", using: :gin, opclasses: {"name"=>"gin_trgm_ops"}
+    t.index ["owner_id"], name: "index_namespaces_on_owner_id", using: :btree
+    t.index ["parent_id", "id"], name: "index_namespaces_on_parent_id_and_id", unique: true, using: :btree
+    t.index ["path"], name: "index_namespaces_on_path", using: :btree
+    t.index ["path"], name: "index_namespaces_on_path_trigram", using: :gin, opclasses: {"path"=>"gin_trgm_ops"}
+    t.index ["require_two_factor_authentication"], name: "index_namespaces_on_require_two_factor_authentication", using: :btree
+    t.index ["runners_token"], name: "index_namespaces_on_runners_token", unique: true, using: :btree
+    t.index ["type"], name: "index_namespaces_on_type", using: :btree
   end
 
-  add_index "namespaces", ["created_at"], name: "index_namespaces_on_created_at", using: :btree
-  add_index "namespaces", ["name", "parent_id"], name: "index_namespaces_on_name_and_parent_id", unique: true, using: :btree
-  add_index "namespaces", ["name"], name: "index_namespaces_on_name_trigram", using: :gin, opclasses: {"name"=>"gin_trgm_ops"}
-  add_index "namespaces", ["owner_id"], name: "index_namespaces_on_owner_id", using: :btree
-  add_index "namespaces", ["parent_id", "id"], name: "index_namespaces_on_parent_id_and_id", unique: true, using: :btree
-  add_index "namespaces", ["path"], name: "index_namespaces_on_path", using: :btree
-  add_index "namespaces", ["path"], name: "index_namespaces_on_path_trigram", using: :gin, opclasses: {"path"=>"gin_trgm_ops"}
-  add_index "namespaces", ["require_two_factor_authentication"], name: "index_namespaces_on_require_two_factor_authentication", using: :btree
-  add_index "namespaces", ["runners_token"], name: "index_namespaces_on_runners_token", unique: true, using: :btree
-  add_index "namespaces", ["type"], name: "index_namespaces_on_type", using: :btree
-
   create_table "note_diff_files", force: :cascade do |t|
     t.integer "diff_note_id", null: false
     t.text "diff", null: false
@@ -1402,10 +1327,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "b_mode", null: false
     t.text "new_path", null: false
     t.text "old_path", null: false
+    t.index ["diff_note_id"], name: "index_note_diff_files_on_diff_note_id", unique: true, using: :btree
   end
 
-  add_index "note_diff_files", ["diff_note_id"], name: "index_note_diff_files_on_diff_note_id", unique: true, using: :btree
-
   create_table "notes", force: :cascade do |t|
     t.text "note"
     t.string "noteable_type"
@@ -1430,19 +1354,18 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "cached_markdown_version"
     t.text "change_position"
     t.boolean "resolved_by_push"
+    t.index ["author_id"], name: "index_notes_on_author_id", using: :btree
+    t.index ["commit_id"], name: "index_notes_on_commit_id", using: :btree
+    t.index ["created_at"], name: "index_notes_on_created_at", using: :btree
+    t.index ["discussion_id"], name: "index_notes_on_discussion_id", using: :btree
+    t.index ["line_code"], name: "index_notes_on_line_code", using: :btree
+    t.index ["note"], name: "index_notes_on_note_trigram", using: :gin, opclasses: {"note"=>"gin_trgm_ops"}
+    t.index ["noteable_id", "noteable_type"], name: "index_notes_on_noteable_id_and_noteable_type", using: :btree
+    t.index ["noteable_type"], name: "index_notes_on_noteable_type", using: :btree
+    t.index ["project_id", "noteable_type"], name: "index_notes_on_project_id_and_noteable_type", using: :btree
+    t.index ["updated_at"], name: "index_notes_on_updated_at", using: :btree
   end
 
-  add_index "notes", ["author_id"], name: "index_notes_on_author_id", using: :btree
-  add_index "notes", ["commit_id"], name: "index_notes_on_commit_id", using: :btree
-  add_index "notes", ["created_at"], name: "index_notes_on_created_at", using: :btree
-  add_index "notes", ["discussion_id"], name: "index_notes_on_discussion_id", using: :btree
-  add_index "notes", ["line_code"], name: "index_notes_on_line_code", using: :btree
-  add_index "notes", ["note"], name: "index_notes_on_note_trigram", using: :gin, opclasses: {"note"=>"gin_trgm_ops"}
-  add_index "notes", ["noteable_id", "noteable_type"], name: "index_notes_on_noteable_id_and_noteable_type", using: :btree
-  add_index "notes", ["noteable_type"], name: "index_notes_on_noteable_type", using: :btree
-  add_index "notes", ["project_id", "noteable_type"], name: "index_notes_on_project_id_and_noteable_type", using: :btree
-  add_index "notes", ["updated_at"], name: "index_notes_on_updated_at", using: :btree
-
   create_table "notification_settings", force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "source_id"
@@ -1464,12 +1387,11 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "success_pipeline"
     t.boolean "push_to_merge_request"
     t.boolean "issue_due"
+    t.index ["source_id", "source_type"], name: "index_notification_settings_on_source_id_and_source_type", using: :btree
+    t.index ["user_id", "source_id", "source_type"], name: "index_notifications_on_user_id_and_source_id_and_source_type", unique: true, using: :btree
+    t.index ["user_id"], name: "index_notification_settings_on_user_id", using: :btree
   end
 
-  add_index "notification_settings", ["source_id", "source_type"], name: "index_notification_settings_on_source_id_and_source_type", using: :btree
-  add_index "notification_settings", ["user_id", "source_id", "source_type"], name: "index_notifications_on_user_id_and_source_id_and_source_type", unique: true, using: :btree
-  add_index "notification_settings", ["user_id"], name: "index_notification_settings_on_user_id", using: :btree
-
   create_table "oauth_access_grants", force: :cascade do |t|
     t.integer "resource_owner_id", null: false
     t.integer "application_id", null: false
@@ -1479,10 +1401,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "created_at", null: false
     t.datetime "revoked_at"
     t.string "scopes"
+    t.index ["token"], name: "index_oauth_access_grants_on_token", unique: true, using: :btree
   end
 
-  add_index "oauth_access_grants", ["token"], name: "index_oauth_access_grants_on_token", unique: true, using: :btree
-
   create_table "oauth_access_tokens", force: :cascade do |t|
     t.integer "resource_owner_id"
     t.integer "application_id"
@@ -1492,12 +1413,11 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "revoked_at"
     t.datetime "created_at", null: false
     t.string "scopes"
+    t.index ["refresh_token"], name: "index_oauth_access_tokens_on_refresh_token", unique: true, using: :btree
+    t.index ["resource_owner_id"], name: "index_oauth_access_tokens_on_resource_owner_id", using: :btree
+    t.index ["token"], name: "index_oauth_access_tokens_on_token", unique: true, using: :btree
   end
 
-  add_index "oauth_access_tokens", ["refresh_token"], name: "index_oauth_access_tokens_on_refresh_token", unique: true, using: :btree
-  add_index "oauth_access_tokens", ["resource_owner_id"], name: "index_oauth_access_tokens_on_resource_owner_id", using: :btree
-  add_index "oauth_access_tokens", ["token"], name: "index_oauth_access_tokens_on_token", unique: true, using: :btree
-
   create_table "oauth_applications", force: :cascade do |t|
     t.string "name", null: false
     t.string "uid", null: false
@@ -1509,11 +1429,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "owner_id"
     t.string "owner_type"
     t.boolean "trusted", default: false, null: false
+    t.index ["owner_id", "owner_type"], name: "index_oauth_applications_on_owner_id_and_owner_type", using: :btree
+    t.index ["uid"], name: "index_oauth_applications_on_uid", unique: true, using: :btree
   end
 
-  add_index "oauth_applications", ["owner_id", "owner_type"], name: "index_oauth_applications_on_owner_id_and_owner_type", using: :btree
-  add_index "oauth_applications", ["uid"], name: "index_oauth_applications_on_uid", unique: true, using: :btree
-
   create_table "oauth_openid_requests", force: :cascade do |t|
     t.integer "access_grant_id", null: false
     t.string "nonce", null: false
@@ -1529,14 +1448,13 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime_with_timezone "verified_at"
     t.string "verification_code", null: false
     t.datetime_with_timezone "enabled_until"
+    t.index ["domain"], name: "index_pages_domains_on_domain", unique: true, using: :btree
+    t.index ["project_id", "enabled_until"], name: "index_pages_domains_on_project_id_and_enabled_until", using: :btree
+    t.index ["project_id"], name: "index_pages_domains_on_project_id", using: :btree
+    t.index ["verified_at", "enabled_until"], name: "index_pages_domains_on_verified_at_and_enabled_until", using: :btree
+    t.index ["verified_at"], name: "index_pages_domains_on_verified_at", using: :btree
   end
 
-  add_index "pages_domains", ["domain"], name: "index_pages_domains_on_domain", unique: true, using: :btree
-  add_index "pages_domains", ["project_id", "enabled_until"], name: "index_pages_domains_on_project_id_and_enabled_until", using: :btree
-  add_index "pages_domains", ["project_id"], name: "index_pages_domains_on_project_id", using: :btree
-  add_index "pages_domains", ["verified_at", "enabled_until"], name: "index_pages_domains_on_verified_at_and_enabled_until", using: :btree
-  add_index "pages_domains", ["verified_at"], name: "index_pages_domains_on_verified_at", using: :btree
-
   create_table "personal_access_tokens", force: :cascade do |t|
     t.integer "user_id", null: false
     t.string "token"
@@ -1548,29 +1466,26 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "scopes", default: "--- []\n", null: false
     t.boolean "impersonation", default: false, null: false
     t.string "token_digest"
+    t.index ["token"], name: "index_personal_access_tokens_on_token", unique: true, using: :btree
+    t.index ["token_digest"], name: "index_personal_access_tokens_on_token_digest", unique: true, using: :btree
+    t.index ["user_id"], name: "index_personal_access_tokens_on_user_id", using: :btree
   end
 
-  add_index "personal_access_tokens", ["token"], name: "index_personal_access_tokens_on_token", unique: true, using: :btree
-  add_index "personal_access_tokens", ["token_digest"], name: "index_personal_access_tokens_on_token_digest", unique: true, using: :btree
-  add_index "personal_access_tokens", ["user_id"], name: "index_personal_access_tokens_on_user_id", using: :btree
-
   create_table "programming_languages", force: :cascade do |t|
     t.string "name", null: false
     t.string "color", null: false
     t.datetime_with_timezone "created_at", null: false
+    t.index ["name"], name: "index_programming_languages_on_name", unique: true, using: :btree
   end
 
-  add_index "programming_languages", ["name"], name: "index_programming_languages_on_name", unique: true, using: :btree
-
   create_table "project_authorizations", id: false, force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "project_id", null: false
     t.integer "access_level", null: false
+    t.index ["project_id"], name: "index_project_authorizations_on_project_id", using: :btree
+    t.index ["user_id", "project_id", "access_level"], name: "index_project_authorizations_on_user_id_project_id_access_level", unique: true, using: :btree
   end
 
-  add_index "project_authorizations", ["project_id"], name: "index_project_authorizations_on_project_id", using: :btree
-  add_index "project_authorizations", ["user_id", "project_id", "access_level"], name: "index_project_authorizations_on_user_id_project_id_access_level", unique: true, using: :btree
-
   create_table "project_auto_devops", force: :cascade do |t|
     t.integer "project_id", null: false
     t.datetime_with_timezone "created_at", null: false
@@ -1578,37 +1493,33 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "enabled"
     t.string "domain"
     t.integer "deploy_strategy", default: 0, null: false
+    t.index ["project_id"], name: "index_project_auto_devops_on_project_id", unique: true, using: :btree
   end
 
-  add_index "project_auto_devops", ["project_id"], name: "index_project_auto_devops_on_project_id", unique: true, using: :btree
-
   create_table "project_ci_cd_settings", force: :cascade do |t|
     t.integer "project_id", null: false
     t.boolean "group_runners_enabled", default: true, null: false
+    t.index ["project_id"], name: "index_project_ci_cd_settings_on_project_id", unique: true, using: :btree
   end
 
-  add_index "project_ci_cd_settings", ["project_id"], name: "index_project_ci_cd_settings_on_project_id", unique: true, using: :btree
-
   create_table "project_custom_attributes", force: :cascade do |t|
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
     t.integer "project_id", null: false
     t.string "key", null: false
     t.string "value", null: false
+    t.index ["key", "value"], name: "index_project_custom_attributes_on_key_and_value", using: :btree
+    t.index ["project_id", "key"], name: "index_project_custom_attributes_on_project_id_and_key", unique: true, using: :btree
   end
 
-  add_index "project_custom_attributes", ["key", "value"], name: "index_project_custom_attributes_on_key_and_value", using: :btree
-  add_index "project_custom_attributes", ["project_id", "key"], name: "index_project_custom_attributes_on_project_id_and_key", unique: true, using: :btree
-
   create_table "project_deploy_tokens", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "deploy_token_id", null: false
     t.datetime_with_timezone "created_at", null: false
+    t.index ["deploy_token_id"], name: "index_project_deploy_tokens_on_deploy_token_id", using: :btree
+    t.index ["project_id", "deploy_token_id"], name: "index_project_deploy_tokens_on_project_id_and_deploy_token_id", unique: true, using: :btree
   end
 
-  add_index "project_deploy_tokens", ["deploy_token_id"], name: "index_project_deploy_tokens_on_deploy_token_id", using: :btree
-  add_index "project_deploy_tokens", ["project_id", "deploy_token_id"], name: "index_project_deploy_tokens_on_project_id_and_deploy_token_id", unique: true, using: :btree
-
   create_table "project_features", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "merge_requests_access_level"
@@ -1620,10 +1531,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "updated_at"
     t.integer "repository_access_level", default: 20, null: false
     t.integer "pages_access_level", default: 20, null: false
+    t.index ["project_id"], name: "index_project_features_on_project_id", unique: true, using: :btree
   end
 
-  add_index "project_features", ["project_id"], name: "index_project_features_on_project_id", unique: true, using: :btree
-
   create_table "project_group_links", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "group_id", null: false
@@ -1631,45 +1541,41 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "updated_at"
     t.integer "group_access", default: 30, null: false
     t.date "expires_at"
+    t.index ["group_id"], name: "index_project_group_links_on_group_id", using: :btree
+    t.index ["project_id"], name: "index_project_group_links_on_project_id", using: :btree
   end
 
-  add_index "project_group_links", ["group_id"], name: "index_project_group_links_on_group_id", using: :btree
-  add_index "project_group_links", ["project_id"], name: "index_project_group_links_on_project_id", using: :btree
-
   create_table "project_import_data", force: :cascade do |t|
     t.integer "project_id"
     t.text "data"
     t.text "encrypted_credentials"
     t.string "encrypted_credentials_iv"
     t.string "encrypted_credentials_salt"
+    t.index ["project_id"], name: "index_project_import_data_on_project_id", using: :btree
   end
 
-  add_index "project_import_data", ["project_id"], name: "index_project_import_data_on_project_id", using: :btree
-
   create_table "project_mirror_data", force: :cascade do |t|
     t.integer "project_id", null: false
     t.string "status"
     t.string "jid"
     t.text "last_error"
+    t.index ["jid"], name: "index_project_mirror_data_on_jid", using: :btree
+    t.index ["project_id"], name: "index_project_mirror_data_on_project_id", unique: true, using: :btree
+    t.index ["status"], name: "index_project_mirror_data_on_status", using: :btree
   end
 
-  add_index "project_mirror_data", ["jid"], name: "index_project_mirror_data_on_jid", using: :btree
-  add_index "project_mirror_data", ["project_id"], name: "index_project_mirror_data_on_project_id", unique: true, using: :btree
-  add_index "project_mirror_data", ["status"], name: "index_project_mirror_data_on_status", using: :btree
-
   create_table "project_statistics", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "namespace_id", null: false
-    t.integer "commit_count", limit: 8, default: 0, null: false
-    t.integer "storage_size", limit: 8, default: 0, null: false
-    t.integer "repository_size", limit: 8, default: 0, null: false
-    t.integer "lfs_objects_size", limit: 8, default: 0, null: false
-    t.integer "build_artifacts_size", limit: 8, default: 0, null: false
+    t.bigint "commit_count", default: 0, null: false
+    t.bigint "storage_size", default: 0, null: false
+    t.bigint "repository_size", default: 0, null: false
+    t.bigint "lfs_objects_size", default: 0, null: false
+    t.bigint "build_artifacts_size", default: 0, null: false
+    t.index ["namespace_id"], name: "index_project_statistics_on_namespace_id", using: :btree
+    t.index ["project_id"], name: "index_project_statistics_on_project_id", unique: true, using: :btree
   end
 
-  add_index "project_statistics", ["namespace_id"], name: "index_project_statistics_on_namespace_id", using: :btree
-  add_index "project_statistics", ["project_id"], name: "index_project_statistics_on_project_id", unique: true, using: :btree
-
   create_table "projects", force: :cascade do |t|
     t.string "name"
     t.string "path"
@@ -1722,29 +1628,28 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "jobs_cache_index"
     t.boolean "pages_https_only", default: true
     t.boolean "remote_mirror_available_overridden"
-    t.integer "pool_repository_id", limit: 8
-  end
-
-  add_index "projects", ["ci_id"], name: "index_projects_on_ci_id", using: :btree
-  add_index "projects", ["created_at"], name: "index_projects_on_created_at", using: :btree
-  add_index "projects", ["creator_id"], name: "index_projects_on_creator_id", using: :btree
-  add_index "projects", ["description"], name: "index_projects_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"}
-  add_index "projects", ["id"], name: "index_projects_on_id_partial_for_visibility", unique: true, where: "(visibility_level = ANY (ARRAY[10, 20]))", using: :btree
-  add_index "projects", ["last_activity_at"], name: "index_projects_on_last_activity_at", using: :btree
-  add_index "projects", ["last_repository_check_at"], name: "index_projects_on_last_repository_check_at", where: "(last_repository_check_at IS NOT NULL)", using: :btree
-  add_index "projects", ["last_repository_check_failed"], name: "index_projects_on_last_repository_check_failed", using: :btree
-  add_index "projects", ["last_repository_updated_at"], name: "index_projects_on_last_repository_updated_at", using: :btree
-  add_index "projects", ["name"], name: "index_projects_on_name_trigram", using: :gin, opclasses: {"name"=>"gin_trgm_ops"}
-  add_index "projects", ["namespace_id"], name: "index_projects_on_namespace_id", using: :btree
-  add_index "projects", ["path"], name: "index_projects_on_path", using: :btree
-  add_index "projects", ["path"], name: "index_projects_on_path_trigram", using: :gin, opclasses: {"path"=>"gin_trgm_ops"}
-  add_index "projects", ["pending_delete"], name: "index_projects_on_pending_delete", using: :btree
-  add_index "projects", ["pool_repository_id"], name: "index_projects_on_pool_repository_id", where: "(pool_repository_id IS NOT NULL)", using: :btree
-  add_index "projects", ["repository_storage", "created_at"], name: "idx_project_repository_check_partial", where: "(last_repository_check_at IS NULL)", using: :btree
-  add_index "projects", ["repository_storage"], name: "index_projects_on_repository_storage", using: :btree
-  add_index "projects", ["runners_token"], name: "index_projects_on_runners_token", using: :btree
-  add_index "projects", ["star_count"], name: "index_projects_on_star_count", using: :btree
-  add_index "projects", ["visibility_level"], name: "index_projects_on_visibility_level", using: :btree
+    t.bigint "pool_repository_id"
+    t.index ["ci_id"], name: "index_projects_on_ci_id", using: :btree
+    t.index ["created_at"], name: "index_projects_on_created_at", using: :btree
+    t.index ["creator_id"], name: "index_projects_on_creator_id", using: :btree
+    t.index ["description"], name: "index_projects_on_description_trigram", using: :gin, opclasses: {"description"=>"gin_trgm_ops"}
+    t.index ["id"], name: "index_projects_on_id_partial_for_visibility", unique: true, where: "(visibility_level = ANY (ARRAY[10, 20]))", using: :btree
+    t.index ["last_activity_at"], name: "index_projects_on_last_activity_at", using: :btree
+    t.index ["last_repository_check_at"], name: "index_projects_on_last_repository_check_at", where: "(last_repository_check_at IS NOT NULL)", using: :btree
+    t.index ["last_repository_check_failed"], name: "index_projects_on_last_repository_check_failed", using: :btree
+    t.index ["last_repository_updated_at"], name: "index_projects_on_last_repository_updated_at", using: :btree
+    t.index ["name"], name: "index_projects_on_name_trigram", using: :gin, opclasses: {"name"=>"gin_trgm_ops"}
+    t.index ["namespace_id"], name: "index_projects_on_namespace_id", using: :btree
+    t.index ["path"], name: "index_projects_on_path", using: :btree
+    t.index ["path"], name: "index_projects_on_path_trigram", using: :gin, opclasses: {"path"=>"gin_trgm_ops"}
+    t.index ["pending_delete"], name: "index_projects_on_pending_delete", using: :btree
+    t.index ["pool_repository_id"], name: "index_projects_on_pool_repository_id", where: "(pool_repository_id IS NOT NULL)", using: :btree
+    t.index ["repository_storage", "created_at"], name: "idx_project_repository_check_partial", where: "(last_repository_check_at IS NULL)", using: :btree
+    t.index ["repository_storage"], name: "index_projects_on_repository_storage", using: :btree
+    t.index ["runners_token"], name: "index_projects_on_runners_token", using: :btree
+    t.index ["star_count"], name: "index_projects_on_star_count", using: :btree
+    t.index ["visibility_level"], name: "index_projects_on_visibility_level", using: :btree
+  end
 
   create_table "prometheus_metrics", force: :cascade do |t|
     t.integer "project_id"
@@ -1758,40 +1663,36 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime_with_timezone "updated_at", null: false
     t.boolean "common", default: false, null: false
     t.string "identifier"
+    t.index ["common"], name: "index_prometheus_metrics_on_common", using: :btree
+    t.index ["group"], name: "index_prometheus_metrics_on_group", using: :btree
+    t.index ["identifier"], name: "index_prometheus_metrics_on_identifier", unique: true, using: :btree
+    t.index ["project_id"], name: "index_prometheus_metrics_on_project_id", using: :btree
   end
 
-  add_index "prometheus_metrics", ["common"], name: "index_prometheus_metrics_on_common", using: :btree
-  add_index "prometheus_metrics", ["group"], name: "index_prometheus_metrics_on_group", using: :btree
-  add_index "prometheus_metrics", ["identifier"], name: "index_prometheus_metrics_on_identifier", unique: true, using: :btree
-  add_index "prometheus_metrics", ["project_id"], name: "index_prometheus_metrics_on_project_id", using: :btree
-
   create_table "protected_branch_merge_access_levels", force: :cascade do |t|
     t.integer "protected_branch_id", null: false
     t.integer "access_level", default: 40, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["protected_branch_id"], name: "index_protected_branch_merge_access", using: :btree
   end
 
-  add_index "protected_branch_merge_access_levels", ["protected_branch_id"], name: "index_protected_branch_merge_access", using: :btree
-
   create_table "protected_branch_push_access_levels", force: :cascade do |t|
     t.integer "protected_branch_id", null: false
     t.integer "access_level", default: 40, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["protected_branch_id"], name: "index_protected_branch_push_access", using: :btree
   end
 
-  add_index "protected_branch_push_access_levels", ["protected_branch_id"], name: "index_protected_branch_push_access", using: :btree
-
   create_table "protected_branches", force: :cascade do |t|
     t.integer "project_id", null: false
     t.string "name", null: false
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["project_id"], name: "index_protected_branches_on_project_id", using: :btree
   end
 
-  add_index "protected_branches", ["project_id"], name: "index_protected_branches_on_project_id", using: :btree
-
   create_table "protected_tag_create_access_levels", force: :cascade do |t|
     t.integer "protected_tag_id", null: false
     t.integer "access_level", default: 40
@@ -1799,23 +1700,21 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "group_id"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["protected_tag_id"], name: "index_protected_tag_create_access", using: :btree
+    t.index ["user_id"], name: "index_protected_tag_create_access_levels_on_user_id", using: :btree
   end
 
-  add_index "protected_tag_create_access_levels", ["protected_tag_id"], name: "index_protected_tag_create_access", using: :btree
-  add_index "protected_tag_create_access_levels", ["user_id"], name: "index_protected_tag_create_access_levels_on_user_id", using: :btree
-
   create_table "protected_tags", force: :cascade do |t|
     t.integer "project_id", null: false
     t.string "name", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["project_id", "name"], name: "index_protected_tags_on_project_id_and_name", unique: true, using: :btree
+    t.index ["project_id"], name: "index_protected_tags_on_project_id", using: :btree
   end
 
-  add_index "protected_tags", ["project_id", "name"], name: "index_protected_tags_on_project_id_and_name", unique: true, using: :btree
-  add_index "protected_tags", ["project_id"], name: "index_protected_tags_on_project_id", using: :btree
-
   create_table "push_event_payloads", id: false, force: :cascade do |t|
-    t.integer "commit_count", limit: 8, null: false
+    t.bigint "commit_count", null: false
     t.integer "event_id", null: false
     t.integer "action", limit: 2, null: false
     t.integer "ref_type", limit: 2, null: false
@@ -1823,21 +1722,19 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.binary "commit_to"
     t.text "ref"
     t.string "commit_title", limit: 70
+    t.index ["event_id"], name: "index_push_event_payloads_on_event_id", unique: true, using: :btree
   end
 
-  add_index "push_event_payloads", ["event_id"], name: "index_push_event_payloads_on_event_id", unique: true, using: :btree
-
   create_table "redirect_routes", force: :cascade do |t|
     t.integer "source_id", null: false
     t.string "source_type", null: false
     t.string "path", null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["path"], name: "index_redirect_routes_on_path", unique: true, using: :btree
+    t.index ["source_type", "source_id"], name: "index_redirect_routes_on_source_type_and_source_id", using: :btree
   end
 
-  add_index "redirect_routes", ["path"], name: "index_redirect_routes_on_path", unique: true, using: :btree
-  add_index "redirect_routes", ["source_type", "source_id"], name: "index_redirect_routes_on_source_type_and_source_id", using: :btree
-
   create_table "releases", force: :cascade do |t|
     t.string "tag"
     t.text "description"
@@ -1846,11 +1743,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "updated_at"
     t.text "description_html"
     t.integer "cached_markdown_version"
+    t.index ["project_id", "tag"], name: "index_releases_on_project_id_and_tag", using: :btree
+    t.index ["project_id"], name: "index_releases_on_project_id", using: :btree
   end
 
-  add_index "releases", ["project_id", "tag"], name: "index_releases_on_project_id_and_tag", using: :btree
-  add_index "releases", ["project_id"], name: "index_releases_on_project_id", using: :btree
-
   create_table "remote_mirrors", force: :cascade do |t|
     t.integer "project_id"
     t.string "url"
@@ -1867,27 +1763,24 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "encrypted_credentials_salt"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["last_successful_update_at"], name: "index_remote_mirrors_on_last_successful_update_at", using: :btree
+    t.index ["project_id"], name: "index_remote_mirrors_on_project_id", using: :btree
   end
 
-  add_index "remote_mirrors", ["last_successful_update_at"], name: "index_remote_mirrors_on_last_successful_update_at", using: :btree
-  add_index "remote_mirrors", ["project_id"], name: "index_remote_mirrors_on_project_id", using: :btree
-
   create_table "repositories", id: :bigserial, force: :cascade do |t|
     t.integer "shard_id", null: false
     t.string "disk_path", null: false
+    t.index ["disk_path"], name: "index_repositories_on_disk_path", unique: true, using: :btree
+    t.index ["shard_id"], name: "index_repositories_on_shard_id", using: :btree
   end
 
-  add_index "repositories", ["disk_path"], name: "index_repositories_on_disk_path", unique: true, using: :btree
-  add_index "repositories", ["shard_id"], name: "index_repositories_on_shard_id", using: :btree
-
   create_table "repository_languages", id: false, force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "programming_language_id", null: false
     t.float "share", null: false
+    t.index ["project_id", "programming_language_id"], name: "index_repository_languages_on_project_and_languages_id", unique: true, using: :btree
   end
 
-  add_index "repository_languages", ["project_id", "programming_language_id"], name: "index_repository_languages_on_project_and_languages_id", unique: true, using: :btree
-
   create_table "resource_label_events", id: :bigserial, force: :cascade do |t|
     t.integer "action", null: false
     t.integer "issue_id"
@@ -1898,13 +1791,12 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "cached_markdown_version"
     t.text "reference"
     t.text "reference_html"
+    t.index ["issue_id"], name: "index_resource_label_events_on_issue_id", using: :btree
+    t.index ["label_id"], name: "index_resource_label_events_on_label_id", using: :btree
+    t.index ["merge_request_id"], name: "index_resource_label_events_on_merge_request_id", using: :btree
+    t.index ["user_id"], name: "index_resource_label_events_on_user_id", using: :btree
   end
 
-  add_index "resource_label_events", ["issue_id"], name: "index_resource_label_events_on_issue_id", using: :btree
-  add_index "resource_label_events", ["label_id"], name: "index_resource_label_events_on_label_id", using: :btree
-  add_index "resource_label_events", ["merge_request_id"], name: "index_resource_label_events_on_merge_request_id", using: :btree
-  add_index "resource_label_events", ["user_id"], name: "index_resource_label_events_on_user_id", using: :btree
-
   create_table "routes", force: :cascade do |t|
     t.integer "source_id", null: false
     t.string "source_type", null: false
@@ -1912,12 +1804,11 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "created_at"
     t.datetime "updated_at"
     t.string "name"
+    t.index ["path"], name: "index_routes_on_path", unique: true, using: :btree
+    t.index ["path"], name: "index_routes_on_path_text_pattern_ops", using: :btree, opclasses: {"path"=>"varchar_pattern_ops"}
+    t.index ["source_type", "source_id"], name: "index_routes_on_source_type_and_source_id", unique: true, using: :btree
   end
 
-  add_index "routes", ["path"], name: "index_routes_on_path", unique: true, using: :btree
-  add_index "routes", ["path"], name: "index_routes_on_path_text_pattern_ops", using: :btree, opclasses: {"path"=>"varchar_pattern_ops"}
-  add_index "routes", ["source_type", "source_id"], name: "index_routes_on_source_type_and_source_id", unique: true, using: :btree
-
   create_table "sent_notifications", force: :cascade do |t|
     t.integer "project_id"
     t.integer "noteable_id"
@@ -1929,10 +1820,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "note_type"
     t.text "position"
     t.string "in_reply_to_discussion_id"
+    t.index ["reply_key"], name: "index_sent_notifications_on_reply_key", unique: true, using: :btree
   end
 
-  add_index "sent_notifications", ["reply_key"], name: "index_sent_notifications_on_reply_key", unique: true, using: :btree
-
   create_table "services", force: :cascade do |t|
     t.string "type"
     t.string "title"
@@ -1955,17 +1845,15 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "commit_events", default: true, null: false
     t.boolean "job_events", default: false, null: false
     t.boolean "confidential_note_events", default: true
+    t.index ["project_id"], name: "index_services_on_project_id", using: :btree
+    t.index ["template"], name: "index_services_on_template", using: :btree
   end
 
-  add_index "services", ["project_id"], name: "index_services_on_project_id", using: :btree
-  add_index "services", ["template"], name: "index_services_on_template", using: :btree
-
   create_table "shards", force: :cascade do |t|
     t.string "name", null: false
+    t.index ["name"], name: "index_shards_on_name", unique: true, using: :btree
   end
 
-  add_index "shards", ["name"], name: "index_shards_on_name", unique: true, using: :btree
-
   create_table "site_statistics", force: :cascade do |t|
     t.integer "repositories_count", default: 0, null: false
   end
@@ -1985,15 +1873,14 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "cached_markdown_version"
     t.text "description"
     t.text "description_html"
+    t.index ["author_id"], name: "index_snippets_on_author_id", using: :btree
+    t.index ["file_name"], name: "index_snippets_on_file_name_trigram", using: :gin, opclasses: {"file_name"=>"gin_trgm_ops"}
+    t.index ["project_id"], name: "index_snippets_on_project_id", using: :btree
+    t.index ["title"], name: "index_snippets_on_title_trigram", using: :gin, opclasses: {"title"=>"gin_trgm_ops"}
+    t.index ["updated_at"], name: "index_snippets_on_updated_at", using: :btree
+    t.index ["visibility_level"], name: "index_snippets_on_visibility_level", using: :btree
   end
 
-  add_index "snippets", ["author_id"], name: "index_snippets_on_author_id", using: :btree
-  add_index "snippets", ["file_name"], name: "index_snippets_on_file_name_trigram", using: :gin, opclasses: {"file_name"=>"gin_trgm_ops"}
-  add_index "snippets", ["project_id"], name: "index_snippets_on_project_id", using: :btree
-  add_index "snippets", ["title"], name: "index_snippets_on_title_trigram", using: :gin, opclasses: {"title"=>"gin_trgm_ops"}
-  add_index "snippets", ["updated_at"], name: "index_snippets_on_updated_at", using: :btree
-  add_index "snippets", ["visibility_level"], name: "index_snippets_on_visibility_level", using: :btree
-
   create_table "spam_logs", force: :cascade do |t|
     t.integer "user_id"
     t.string "source_ip"
@@ -2016,20 +1903,18 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "created_at"
     t.datetime "updated_at"
     t.integer "project_id"
+    t.index ["subscribable_id", "subscribable_type", "user_id", "project_id"], name: "index_subscriptions_on_subscribable_and_user_id_and_project_id", unique: true, using: :btree
   end
 
-  add_index "subscriptions", ["subscribable_id", "subscribable_type", "user_id", "project_id"], name: "index_subscriptions_on_subscribable_and_user_id_and_project_id", unique: true, using: :btree
-
   create_table "system_note_metadata", force: :cascade do |t|
     t.integer "note_id", null: false
     t.integer "commit_count"
     t.string "action"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["note_id"], name: "index_system_note_metadata_on_note_id", unique: true, using: :btree
   end
 
-  add_index "system_note_metadata", ["note_id"], name: "index_system_note_metadata_on_note_id", unique: true, using: :btree
-
   create_table "taggings", force: :cascade do |t|
     t.integer "tag_id"
     t.integer "taggable_id"
@@ -2038,32 +1923,29 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "tagger_type"
     t.string "context"
     t.datetime "created_at"
+    t.index ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true, using: :btree
+    t.index ["tag_id"], name: "index_taggings_on_tag_id", using: :btree
+    t.index ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context", using: :btree
+    t.index ["taggable_id", "taggable_type"], name: "index_taggings_on_taggable_id_and_taggable_type", using: :btree
   end
 
-  add_index "taggings", ["tag_id", "taggable_id", "taggable_type", "context", "tagger_id", "tagger_type"], name: "taggings_idx", unique: true, using: :btree
-  add_index "taggings", ["tag_id"], name: "index_taggings_on_tag_id", using: :btree
-  add_index "taggings", ["taggable_id", "taggable_type", "context"], name: "index_taggings_on_taggable_id_and_taggable_type_and_context", using: :btree
-  add_index "taggings", ["taggable_id", "taggable_type"], name: "index_taggings_on_taggable_id_and_taggable_type", using: :btree
-
   create_table "tags", force: :cascade do |t|
     t.string "name"
     t.integer "taggings_count", default: 0
+    t.index ["name"], name: "index_tags_on_name", unique: true, using: :btree
   end
 
-  add_index "tags", ["name"], name: "index_tags_on_name", unique: true, using: :btree
-
   create_table "term_agreements", force: :cascade do |t|
     t.integer "term_id", null: false
     t.integer "user_id", null: false
     t.boolean "accepted", default: false, null: false
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
+    t.index ["term_id"], name: "index_term_agreements_on_term_id", using: :btree
+    t.index ["user_id", "term_id"], name: "term_agreements_unique_index", unique: true, using: :btree
+    t.index ["user_id"], name: "index_term_agreements_on_user_id", using: :btree
   end
 
-  add_index "term_agreements", ["term_id"], name: "index_term_agreements_on_term_id", using: :btree
-  add_index "term_agreements", ["user_id", "term_id"], name: "term_agreements_unique_index", unique: true, using: :btree
-  add_index "term_agreements", ["user_id"], name: "index_term_agreements_on_user_id", using: :btree
-
   create_table "timelogs", force: :cascade do |t|
     t.integer "time_spent", null: false
     t.integer "user_id"
@@ -2072,12 +1954,11 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "issue_id"
     t.integer "merge_request_id"
     t.datetime_with_timezone "spent_at"
+    t.index ["issue_id"], name: "index_timelogs_on_issue_id", using: :btree
+    t.index ["merge_request_id"], name: "index_timelogs_on_merge_request_id", using: :btree
+    t.index ["user_id"], name: "index_timelogs_on_user_id", using: :btree
   end
 
-  add_index "timelogs", ["issue_id"], name: "index_timelogs_on_issue_id", using: :btree
-  add_index "timelogs", ["merge_request_id"], name: "index_timelogs_on_merge_request_id", using: :btree
-  add_index "timelogs", ["user_id"], name: "index_timelogs_on_user_id", using: :btree
-
   create_table "todos", force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "project_id"
@@ -2091,24 +1972,22 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.integer "note_id"
     t.string "commit_id"
     t.integer "group_id"
+    t.index ["author_id"], name: "index_todos_on_author_id", using: :btree
+    t.index ["commit_id"], name: "index_todos_on_commit_id", using: :btree
+    t.index ["group_id"], name: "index_todos_on_group_id", using: :btree
+    t.index ["note_id"], name: "index_todos_on_note_id", using: :btree
+    t.index ["project_id"], name: "index_todos_on_project_id", using: :btree
+    t.index ["target_type", "target_id"], name: "index_todos_on_target_type_and_target_id", using: :btree
+    t.index ["user_id", "id"], name: "index_todos_on_user_id_and_id_done", where: "((state)::text = 'done'::text)", using: :btree
+    t.index ["user_id", "id"], name: "index_todos_on_user_id_and_id_pending", where: "((state)::text = 'pending'::text)", using: :btree
+    t.index ["user_id"], name: "index_todos_on_user_id", using: :btree
   end
 
-  add_index "todos", ["author_id"], name: "index_todos_on_author_id", using: :btree
-  add_index "todos", ["commit_id"], name: "index_todos_on_commit_id", using: :btree
-  add_index "todos", ["group_id"], name: "index_todos_on_group_id", using: :btree
-  add_index "todos", ["note_id"], name: "index_todos_on_note_id", using: :btree
-  add_index "todos", ["project_id"], name: "index_todos_on_project_id", using: :btree
-  add_index "todos", ["target_type", "target_id"], name: "index_todos_on_target_type_and_target_id", using: :btree
-  add_index "todos", ["user_id", "id"], name: "index_todos_on_user_id_and_id_done", where: "((state)::text = 'done'::text)", using: :btree
-  add_index "todos", ["user_id", "id"], name: "index_todos_on_user_id_and_id_pending", where: "((state)::text = 'pending'::text)", using: :btree
-  add_index "todos", ["user_id"], name: "index_todos_on_user_id", using: :btree
-
   create_table "trending_projects", force: :cascade do |t|
     t.integer "project_id", null: false
+    t.index ["project_id"], name: "index_trending_projects_on_project_id", unique: true, using: :btree
   end
 
-  add_index "trending_projects", ["project_id"], name: "index_trending_projects_on_project_id", unique: true, using: :btree
-
   create_table "u2f_registrations", force: :cascade do |t|
     t.text "certificate"
     t.string "key_handle"
@@ -2118,13 +1997,12 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
     t.string "name"
+    t.index ["key_handle"], name: "index_u2f_registrations_on_key_handle", using: :btree
+    t.index ["user_id"], name: "index_u2f_registrations_on_user_id", using: :btree
   end
 
-  add_index "u2f_registrations", ["key_handle"], name: "index_u2f_registrations_on_key_handle", using: :btree
-  add_index "u2f_registrations", ["user_id"], name: "index_u2f_registrations_on_user_id", using: :btree
-
   create_table "uploads", force: :cascade do |t|
-    t.integer "size", limit: 8, null: false
+    t.bigint "size", null: false
     t.string "path", limit: 511, null: false
     t.string "checksum", limit: 64
     t.integer "model_id"
@@ -2134,13 +2012,12 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "mount_point"
     t.string "secret"
     t.integer "store"
+    t.index ["checksum"], name: "index_uploads_on_checksum", using: :btree
+    t.index ["model_id", "model_type"], name: "index_uploads_on_model_id_and_model_type", using: :btree
+    t.index ["store"], name: "index_uploads_on_store", using: :btree
+    t.index ["uploader", "path"], name: "index_uploads_on_uploader_and_path", using: :btree
   end
 
-  add_index "uploads", ["checksum"], name: "index_uploads_on_checksum", using: :btree
-  add_index "uploads", ["model_id", "model_type"], name: "index_uploads_on_model_id_and_model_type", using: :btree
-  add_index "uploads", ["store"], name: "index_uploads_on_store", using: :btree
-  add_index "uploads", ["uploader", "path"], name: "index_uploads_on_uploader_and_path", using: :btree
-
   create_table "user_agent_details", force: :cascade do |t|
     t.string "user_agent", null: false
     t.string "ip_address", null: false
@@ -2149,47 +2026,42 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "submitted", default: false, null: false
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["subject_id", "subject_type"], name: "index_user_agent_details_on_subject_id_and_subject_type", using: :btree
   end
 
-  add_index "user_agent_details", ["subject_id", "subject_type"], name: "index_user_agent_details_on_subject_id_and_subject_type", using: :btree
-
   create_table "user_callouts", force: :cascade do |t|
     t.integer "feature_name", null: false
     t.integer "user_id", null: false
+    t.index ["user_id", "feature_name"], name: "index_user_callouts_on_user_id_and_feature_name", unique: true, using: :btree
+    t.index ["user_id"], name: "index_user_callouts_on_user_id", using: :btree
   end
 
-  add_index "user_callouts", ["user_id", "feature_name"], name: "index_user_callouts_on_user_id_and_feature_name", unique: true, using: :btree
-  add_index "user_callouts", ["user_id"], name: "index_user_callouts_on_user_id", using: :btree
-
   create_table "user_custom_attributes", force: :cascade do |t|
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
     t.integer "user_id", null: false
     t.string "key", null: false
     t.string "value", null: false
+    t.index ["key", "value"], name: "index_user_custom_attributes_on_key_and_value", using: :btree
+    t.index ["user_id", "key"], name: "index_user_custom_attributes_on_user_id_and_key", unique: true, using: :btree
   end
 
-  add_index "user_custom_attributes", ["key", "value"], name: "index_user_custom_attributes_on_key_and_value", using: :btree
-  add_index "user_custom_attributes", ["user_id", "key"], name: "index_user_custom_attributes_on_user_id_and_key", unique: true, using: :btree
-
   create_table "user_interacted_projects", id: false, force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "project_id", null: false
+    t.index ["project_id", "user_id"], name: "index_user_interacted_projects_on_project_id_and_user_id", unique: true, using: :btree
+    t.index ["user_id"], name: "index_user_interacted_projects_on_user_id", using: :btree
   end
 
-  add_index "user_interacted_projects", ["project_id", "user_id"], name: "index_user_interacted_projects_on_project_id_and_user_id", unique: true, using: :btree
-  add_index "user_interacted_projects", ["user_id"], name: "index_user_interacted_projects_on_user_id", using: :btree
-
   create_table "user_preferences", force: :cascade do |t|
     t.integer "user_id", null: false
     t.integer "issue_notes_filter", limit: 2, default: 0, null: false
     t.integer "merge_request_notes_filter", limit: 2, default: 0, null: false
     t.datetime_with_timezone "created_at", null: false
     t.datetime_with_timezone "updated_at", null: false
+    t.index ["user_id"], name: "index_user_preferences_on_user_id", unique: true, using: :btree
   end
 
-  add_index "user_preferences", ["user_id"], name: "index_user_preferences_on_user_id", unique: true, using: :btree
-
   create_table "user_statuses", primary_key: "user_id", force: :cascade do |t|
     t.integer "cached_markdown_version"
     t.string "emoji", default: "speech_balloon", null: false
@@ -2203,10 +2075,9 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "location_synced", default: false
     t.integer "user_id", null: false
     t.string "provider"
+    t.index ["user_id"], name: "index_user_synced_attributes_metadata_on_user_id", unique: true, using: :btree
   end
 
-  add_index "user_synced_attributes_metadata", ["user_id"], name: "index_user_synced_attributes_metadata_on_user_id", unique: true, using: :btree
-
   create_table "users", force: :cascade do |t|
     t.string "email", default: "", null: false
     t.string "encrypted_password", default: "", null: false
@@ -2276,33 +2147,31 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.boolean "private_profile"
     t.boolean "include_private_contributions"
     t.string "commit_email"
+    t.index ["admin"], name: "index_users_on_admin", using: :btree
+    t.index ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true, using: :btree
+    t.index ["created_at"], name: "index_users_on_created_at", using: :btree
+    t.index ["email"], name: "index_users_on_email", unique: true, using: :btree
+    t.index ["email"], name: "index_users_on_email_trigram", using: :gin, opclasses: {"email"=>"gin_trgm_ops"}
+    t.index ["feed_token"], name: "index_users_on_feed_token", using: :btree
+    t.index ["ghost"], name: "index_users_on_ghost", using: :btree
+    t.index ["incoming_email_token"], name: "index_users_on_incoming_email_token", using: :btree
+    t.index ["name"], name: "index_users_on_name", using: :btree
+    t.index ["name"], name: "index_users_on_name_trigram", using: :gin, opclasses: {"name"=>"gin_trgm_ops"}
+    t.index ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
+    t.index ["state"], name: "index_users_on_state", using: :btree
+    t.index ["username"], name: "index_users_on_username", using: :btree
+    t.index ["username"], name: "index_users_on_username_trigram", using: :gin, opclasses: {"username"=>"gin_trgm_ops"}
   end
 
-  add_index "users", ["admin"], name: "index_users_on_admin", using: :btree
-  add_index "users", ["confirmation_token"], name: "index_users_on_confirmation_token", unique: true, using: :btree
-  add_index "users", ["created_at"], name: "index_users_on_created_at", using: :btree
-  add_index "users", ["email"], name: "index_users_on_email", unique: true, using: :btree
-  add_index "users", ["email"], name: "index_users_on_email_trigram", using: :gin, opclasses: {"email"=>"gin_trgm_ops"}
-  add_index "users", ["feed_token"], name: "index_users_on_feed_token", using: :btree
-  add_index "users", ["ghost"], name: "index_users_on_ghost", using: :btree
-  add_index "users", ["incoming_email_token"], name: "index_users_on_incoming_email_token", using: :btree
-  add_index "users", ["name"], name: "index_users_on_name", using: :btree
-  add_index "users", ["name"], name: "index_users_on_name_trigram", using: :gin, opclasses: {"name"=>"gin_trgm_ops"}
-  add_index "users", ["reset_password_token"], name: "index_users_on_reset_password_token", unique: true, using: :btree
-  add_index "users", ["state"], name: "index_users_on_state", using: :btree
-  add_index "users", ["username"], name: "index_users_on_username", using: :btree
-  add_index "users", ["username"], name: "index_users_on_username_trigram", using: :gin, opclasses: {"username"=>"gin_trgm_ops"}
-
   create_table "users_star_projects", force: :cascade do |t|
     t.integer "project_id", null: false
     t.integer "user_id", null: false
     t.datetime "created_at"
     t.datetime "updated_at"
+    t.index ["project_id"], name: "index_users_star_projects_on_project_id", using: :btree
+    t.index ["user_id", "project_id"], name: "index_users_star_projects_on_user_id_and_project_id", unique: true, using: :btree
   end
 
-  add_index "users_star_projects", ["project_id"], name: "index_users_star_projects_on_project_id", using: :btree
-  add_index "users_star_projects", ["user_id", "project_id"], name: "index_users_star_projects_on_user_id_and_project_id", unique: true, using: :btree
-
   create_table "web_hook_logs", force: :cascade do |t|
     t.integer "web_hook_id", null: false
     t.string "trigger"
@@ -2316,11 +2185,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "internal_error_message"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
+    t.index ["created_at", "web_hook_id"], name: "index_web_hook_logs_on_created_at_and_web_hook_id", using: :btree
+    t.index ["web_hook_id"], name: "index_web_hook_logs_on_web_hook_id", using: :btree
   end
 
-  add_index "web_hook_logs", ["created_at", "web_hook_id"], name: "index_web_hook_logs_on_created_at_and_web_hook_id", using: :btree
-  add_index "web_hook_logs", ["web_hook_id"], name: "index_web_hook_logs_on_web_hook_id", using: :btree
-
   create_table "web_hooks", force: :cascade do |t|
     t.integer "project_id"
     t.datetime "created_at"
@@ -2344,11 +2212,10 @@ ActiveRecord::Schema.define(version: 20181107054254) do
     t.string "encrypted_token_iv"
     t.string "encrypted_url"
     t.string "encrypted_url_iv"
+    t.index ["project_id"], name: "index_web_hooks_on_project_id", using: :btree
+    t.index ["type"], name: "index_web_hooks_on_type", using: :btree
   end
 
-  add_index "web_hooks", ["project_id"], name: "index_web_hooks_on_project_id", using: :btree
-  add_index "web_hooks", ["type"], name: "index_web_hooks_on_type", using: :btree
-
   add_foreign_key "application_settings", "users", column: "usage_stats_set_by_user_id", name: "fk_964370041d", on_delete: :nullify
   add_foreign_key "badges", "namespaces", column: "group_id", on_delete: :cascade
   add_foreign_key "badges", "projects", on_delete: :cascade
diff --git a/doc/development/README.md b/doc/development/README.md
index 14dfe8eb1f3..0080c34c056 100644
--- a/doc/development/README.md
+++ b/doc/development/README.md
@@ -51,6 +51,7 @@ description: 'Learn how to contribute to GitLab.'
 - [Prometheus metrics](prometheus_metrics.md)
 - [Guidelines for reusing abstractions](reusing_abstractions.md)
 - [DeclarativePolicy framework](policies.md)
+- [Switching to Rails 5](switching_to_rails5.md)
 
 ## Performance guides
 
diff --git a/doc/development/switching_to_rails5.md b/doc/development/switching_to_rails5.md
new file mode 100644
index 00000000000..c9a4ce1a1d1
--- /dev/null
+++ b/doc/development/switching_to_rails5.md
@@ -0,0 +1,27 @@
+# Switching to Rails 5
+
+GitLab switched recently to Rails 5. This is a big change (especially for backend development) and it introduces couple of temporary inconveniences.
+
+## After the switch, I found a broken feature. What do I do?
+
+Many fixes and tweaks were done to make our codebase compatible with Rails 5, but it's possible that not all issues were found. If you find an bug, please create an issue and assign it the ~rails5 label.
+
+## It takes much longer to run CI pipelines that build GitLab. Why?
+
+We are temporarily running CI pipelines with Rails 4 and 5 so that we ensure we remain compatible with Rails 4 in case we must revert back to Rails 4 from Rails 5 (this can double the duration of CI pipelines).
+
+We might revert back to Rails 4 if we found a major issue we were unable to quickly fix.
+
+Once we are sure we can stay with Rails 5, we will stop running CI pipelines with Rails 4.
+
+## Can I skip running Rails 4 tests?
+
+If you are sure that your merge request doesn't introduce any incompatibility, you can just include `norails4` anywhere in your branch name and Rails 4 tests will be skipped.
+
+## CI is failing on my test with Rails 4. How can I debug it?
+
+You can run specs locally with Rails 4 using the following command:
+
+```sh
+BUNDLE_GEMFILE=Gemfile.rails4 RAILS5=0 bundle exec rspec ...
+```
diff --git a/scripts/rails4-gemfile-lock-check b/scripts/rails4-gemfile-lock-check
new file mode 100755
index 00000000000..a74a49874e1
--- /dev/null
+++ b/scripts/rails4-gemfile-lock-check
@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+
+echo -e "=> Checking if Gemfile.rails4.lock is up-to-date...\\n"
+
+cp Gemfile.rails4.lock Gemfile.rails4.lock.orig
+BUNDLE_GEMFILE=Gemfile.rails4 bundle install "$BUNDLE_INSTALL_FLAGS"
+diff -u Gemfile.rails4.lock.orig Gemfile.rails4.lock >/dev/null 2>&1
+
+if [ $? == 1 ]
+then
+  diff -u Gemfile.rails4.lock.orig Gemfile.rails4.lock
+
+  echo -e "\\n✖ ERROR: Gemfile.rails4.lock is not up-to-date!
+         Please run 'BUNDLE_GEMFILE=Gemfile.rails4 bundle install'\\n" >&2
+  exit 1
+fi
+
+echo "✔ Gemfile.rails4.lock is up-to-date"
+exit 0
diff --git a/scripts/rails5-gemfile-lock-check b/scripts/rails5-gemfile-lock-check
deleted file mode 100755
index da6f1b7145e..00000000000
--- a/scripts/rails5-gemfile-lock-check
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/env bash
-
-echo -e "=> Checking if Gemfile.rails5.lock is up-to-date...\\n"
-
-cp Gemfile.rails5.lock Gemfile.rails5.lock.orig
-BUNDLE_GEMFILE=Gemfile.rails5 bundle install "$BUNDLE_INSTALL_FLAGS"
-diff -u Gemfile.rails5.lock.orig Gemfile.rails5.lock >/dev/null 2>&1
-
-if [ $? == 1 ]
-then
-  diff -u Gemfile.rails5.lock.orig Gemfile.rails5.lock
-
-  echo -e "\\n✖ ERROR: Gemfile.rails5.lock is not up-to-date!
-         Please run 'BUNDLE_GEMFILE=Gemfile.rails5 bundle install'\\n" >&2
-  exit 1
-fi
-
-echo "✔ Gemfile.rails5.lock is up-to-date"
-exit 0
diff --git a/spec/lib/gitlab/database/migration_helpers_spec.rb b/spec/lib/gitlab/database/migration_helpers_spec.rb
index 4e83b27e4a5..23f27939dd2 100644
--- a/spec/lib/gitlab/database/migration_helpers_spec.rb
+++ b/spec/lib/gitlab/database/migration_helpers_spec.rb
@@ -1338,7 +1338,12 @@ describe Gitlab::Database::MigrationHelpers do
   end
 
   describe '#index_exists_by_name?' do
-    it 'returns true if an index exists' do
+    # TODO: remove rails5-only after removing rails4 tests
+    # rails 4 can not handle multiple indexes on the same column set if
+    # index was added by 't.index' - t.index is used by default in schema.rb in
+    # rails 5. Let's run this test only in rails 5 env:
+    # see https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21492#note_113602758
+    it 'returns true if an index exists', :rails5 do
       expect(model.index_exists_by_name?(:projects, 'index_projects_on_path'))
         .to be_truthy
     end
diff --git a/spec/lib/gitlab/github_import/importer/pull_request_importer_spec.rb b/spec/lib/gitlab/github_import/importer/pull_request_importer_spec.rb
index 25684ea9e2c..efca8564894 100644
--- a/spec/lib/gitlab/github_import/importer/pull_request_importer_spec.rb
+++ b/spec/lib/gitlab/github_import/importer/pull_request_importer_spec.rb
@@ -240,7 +240,12 @@ describe Gitlab::GithubImport::Importer::PullRequestImporter, :clean_gitlab_redi
           .and_return(user.id)
       end
 
-      it 'returns the existing merge request' do
+      # TODO: remove rails5-only after removing rails4 tests
+      # rails 4 can not handle multiple indexes on the same column set if
+      # index was added by 't.index' - t.index is used by default in schema.rb in
+      # rails 5. Let's run this test only in rails 5 env:
+      # see https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/21492#note_113602758
+      it 'returns the existing merge request', :rails5 do
         mr1, exists1 = importer.create_merge_request
         mr2, exists2 = importer.create_merge_request
 
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index cd69160be10..3fedb9ed48c 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -235,6 +235,10 @@ RSpec.configure do |config|
     example.run if Gitlab::Database.mysql?
   end
 
+  config.around(:each, :rails5) do |example|
+    example.run if Gitlab.rails5?
+  end
+
   # This makes sure the `ApplicationController#can?` method is stubbed with the
   # original implementation for all view specs.
   config.before(:each, type: :view) do