show who merged request

app/models/merge_request.rb

@@ -68,6 +68,10 @@ class MergeRequest < ActiveRecord::Base
     commits.first
   end
 
+  def merge_event
+    self.project.events.where(:target_id => self.id, :target_type => "MergeRequest", :action => Event::Merged).last
+  end
+
   # Return the number of +1 comments (upvotes)
   def upvotes
     notes.select(&:upvote?).size

app/models/project.rb

@@ -99,7 +99,8 @@ class Project < ActiveRecord::Base
         Event.create(
           :project => self,
           :action => Event::Merged,
-          :data => {:merge_request_id => merge_request.id},
+          :target_id => merge_request.id,
+          :target_type => "MergeRequest",
           :author_id => user.id
         )
       end