1 files changed, 10 insertions, 0 deletions
diff --git a/app/models/issue.rb b/app/models/issue.rb
index fc7e9abe29e..c24a329847c 100644
--- a/app/models/issue.rb
+++ b/app/models/issue.rb
@@ -95,4 +95,14 @@ class Issue < ActiveRecord::Base
   def source_project
     project
   end
+
+  # From all notes on this issue, we'll select the system notes about linked
+  # merge requests. Of those, the MRs closing `self` are returned.
+  def closed_by_merge_requests(current_user)
+    notes.system.flat_map do |note|
+      ext = Gitlab::ReferenceExtractor.new(self.project, current_user)
+      ext.analyze(note.note)
+      ext.merge_requests
+    end.uniq.select { |mr| mr.closes_issue?(self) }
+  end
 end