Merge branch 'master' into go-go-gadget-webpack

* master: (389 commits)
  Document "No gems fetched from git repositories" policy [ci skip]
  Typos
  Small gramatical tweaks
  Typos
  Added PHP & NPM doc
  Use `:empty_project` where possible in request specs
  Add caching of droplab ajax requests
  Use `:empty_project` where possible in model specs
  Revert 3f17f29a
  Remove unused js response from refs controller
  Add MR id to changelog entry
  fixed small mini pipeline graph line glitch
  Prevent form to be submitted twice
  Fix Error 500 when repositories contain annotated tags pointing to blobs
  Fix /explore sorting (trending)
  Simplify wording in "adding an image" docs
  Remove "official merge window" from CONTRIBUTING.md [ci skip]
  Update repository check documentation
  Fixed flexbox and wrap issues
  Update two_factor_authentication.md
  ...

1 files changed, 14 insertions, 1 deletions

diff --git a/app/models/service.rb b/app/models/service.rb
index 19ef3ba9c23..043be222f3a 100644
--- a/app/models/service.rb
+++ b/app/models/service.rb
@@ -76,6 +76,11 @@ class Service < ActiveRecord::Base
 
   def to_param
     # implement inside child
+    self.class.to_param
+  end
+
+  def self.to_param
+    raise NotImplementedError
   end
 
   def fields
@@ -92,7 +97,11 @@ class Service < ActiveRecord::Base
   end
 
   def event_names
-    supported_events.map { |event| "#{event}_events" }
+    self.class.event_names
+  end
+
+  def self.event_names
+    self.supported_events.map { |event| "#{event}_events" }
   end
 
   def event_field(event)
@@ -104,6 +113,10 @@ class Service < ActiveRecord::Base
   end
 
   def supported_events
+    self.class.supported_events
+  end
+
+  def self.supported_events
     %w(push tag_push issue confidential_issue merge_request wiki_page)
   end