Add user activity service and spec. Also added relevant - NOT offline - migration

It uses a user activity table instead of a column in users.
Tested with mySQL and postgreSQL

2 files changed, 35 insertions, 0 deletions

diff --git a/db/migrate/20161007073613_create_user_activities.rb b/db/migrate/20161007073613_create_user_activities.rb
new file mode 100644
index 00000000000..4239cebd8f6
--- /dev/null
+++ b/db/migrate/20161007073613_create_user_activities.rb
@@ -0,0 +1,27 @@
+class CreateUserActivities < ActiveRecord::Migration
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = true
+
+  # When a migration requires downtime you **must** uncomment the following
+  # constant and define a short and easy to understand explanation as to why the
+  # migration requires downtime.
+  DOWNTIME_REASON = 'Adding foreign key'
+
+  # When using the methods "add_concurrent_index" or "add_column_with_default"
+  # you must disable the use of transactions as these methods can not run in an
+  # existing transaction. When using "add_concurrent_index" make sure that this
+  # method is the _only_ method called in the migration, any other changes
+  # should go in a separate migration. This ensures that upon failure _only_ the
+  # index creation fails and can be retried or reverted easily.
+  #
+  # To disable transactions uncomment the following line and remove these
+  # comments:
+  # disable_ddl_transaction!
+
+  def change
+    create_table :user_activities do |t|
+      t.belongs_to :user, index: { unique: true }, foreign_key: { on_delete: :cascade }
+      t.datetime :last_activity_at, null: false
+    end
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 1c592dd5d6d..3ed28a02de2 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1230,6 +1230,13 @@ ActiveRecord::Schema.define(version: 20170408033905) do
   add_index "uploads", ["model_id", "model_type"], name: "index_uploads_on_model_id_and_model_type", using: :btree
   add_index "uploads", ["path"], name: "index_uploads_on_path", using: :btree
 
+  create_table "user_activities", force: :cascade do |t|
+    t.integer "user_id"
+    t.datetime "last_activity_at", null: false
+  end
+
+  add_index "user_activities", ["user_id"], name: "index_user_activities_on_user_id", unique: true, using: :btree
+
   create_table "user_agent_details", force: :cascade do |t|
     t.string "user_agent", null: false
     t.string "ip_address", null: false
@@ -1389,4 +1396,5 @@ ActiveRecord::Schema.define(version: 20170408033905) do
   add_foreign_key "timelogs", "merge_requests", name: "fk_timelogs_merge_requests_merge_request_id", on_delete: :cascade
   add_foreign_key "trending_projects", "projects", on_delete: :cascade
   add_foreign_key "u2f_registrations", "users"
+  add_foreign_key "user_activities", "users", on_delete: :cascade
 end