Backport EE changes on approvals reset for closed MRs

app/models/project.rb

@@ -121,8 +121,6 @@ class Project < ActiveRecord::Base
 
   # Merge Requests for target project should be removed with it
   has_many :merge_requests,     dependent: :destroy, foreign_key: 'target_project_id'
-  # Merge requests from source project should be kept when source project was removed
-  has_many :fork_merge_requests, foreign_key: 'source_project_id', class_name: 'MergeRequest'
   has_many :issues,             dependent: :destroy
   has_many :labels,             dependent: :destroy, class_name: 'ProjectLabel'
   has_many :services,           dependent: :destroy

app/services/merge_requests/base_service.rb

@@ -38,15 +38,13 @@ module MergeRequests
 
     private
 
-    def merge_requests_for(branch)
-      origin_merge_requests = @project.origin_merge_requests
-        .opened.where(source_branch: branch).to_a
-
-      fork_merge_requests = @project.fork_merge_requests
-        .opened.where(source_branch: branch).to_a
-
-      (origin_merge_requests + fork_merge_requests)
-        .uniq.select(&:source_project)
+    # Returns all origin and fork merge requests from `@project` satisfying passed arguments.
+    def merge_requests_for(source_branch, mr_states: [:opened])
+      MergeRequest
+        .with_state(mr_states)
+        .where(source_branch: source_branch, source_project_id: @project.id)
+        .preload(:source_project) # we don't need a #includes since we're just preloading for the #select
+        .select(&:source_project)
     end
 
     def pipeline_merge_requests(pipeline)

app/services/merge_requests/refresh_service.rb

@@ -42,7 +42,7 @@ module MergeRequests
         commit_ids.include?(merge_request.diff_head_sha)
       end
 
-      merge_requests.uniq.select(&:source_project).each do |merge_request|
+      filter_merge_requests(merge_requests).each do |merge_request|
         MergeRequests::PostMergeService.
           new(merge_request.target_project, @current_user).
           execute(merge_request)
@@ -58,10 +58,13 @@ module MergeRequests
     def reload_merge_requests
       merge_requests = @project.merge_requests.opened.
         by_source_or_target_branch(@branch_name).to_a
-      merge_requests += fork_merge_requests
-      merge_requests = filter_merge_requests(merge_requests)
 
-      merge_requests.each do |merge_request|
+      # Fork merge requests
+      merge_requests += MergeRequest.opened
+        .where(source_branch: @branch_name, source_project: @project)
+        .where.not(target_project: @project).to_a
+
+      filter_merge_requests(merge_requests).each do |merge_request|
         if merge_request.source_branch == @branch_name || force_push?
           merge_request.reload_diff
         else
@@ -175,16 +178,7 @@ module MergeRequests
     end
 
     def merge_requests_for_source_branch
-      @source_merge_requests ||= begin
-        merge_requests = @project.origin_merge_requests.opened.where(source_branch: @branch_name).to_a
-        merge_requests += fork_merge_requests
-        filter_merge_requests(merge_requests)
-      end
-    end
-
-    def fork_merge_requests
-      @fork_merge_requests ||= @project.fork_merge_requests.opened.
-        where(source_branch: @branch_name).to_a
+      @source_merge_requests ||= merge_requests_for(@branch_name)
     end
 
     def branch_added?

spec/services/merge_requests/refresh_service_spec.rb

@@ -106,6 +106,8 @@ describe MergeRequests::RefreshService, services: true do
 
     context 'push to fork repo source branch' do
       let(:refresh_service) { service.new(@fork_project, @user) }
+
+      context 'open fork merge request' do
         before do
           allow(refresh_service).to receive(:execute_hooks)
           refresh_service.execute(@oldrev, @newrev, 'refs/heads/master')
@@ -125,6 +127,27 @@ describe MergeRequests::RefreshService, services: true do
         it { expect(@fork_build_failed_todo).to be_pending }
       end
 
+      context 'closed fork merge request' do
+        before do
+          @fork_merge_request.close!
+          allow(refresh_service).to receive(:execute_hooks)
+          refresh_service.execute(@oldrev, @newrev, 'refs/heads/master')
+          reload_mrs
+        end
+
+        it 'do not execute hooks with update action' do
+          expect(refresh_service).not_to have_received(:execute_hooks)
+        end
+
+        it { expect(@merge_request.notes).to be_empty }
+        it { expect(@merge_request).to be_open }
+        it { expect(@fork_merge_request.notes).to be_empty }
+        it { expect(@fork_merge_request).to be_closed }
+        it { expect(@build_failed_todo).to be_pending }
+        it { expect(@fork_build_failed_todo).to be_pending }
+      end
+    end
+
     context 'push to fork repo target branch' do
       describe 'changes to merge requests' do
         before do