Merge branch '60305-fix-mr-assignee-for-mr-push-options' into 'master'

Fix MR assignees for push options

Closes #60305

See merge request gitlab-org/gitlab-ce!27186

app/services/merge_requests/push_options_handler_service.rb

@@ -100,7 +100,7 @@ module MergeRequests
         merge_request = ::MergeRequests::CreateService.new(
           project,
           current_user,
-          merge_request.attributes
+          merge_request.attributes.merge(assignees: merge_request.assignees)
         ).execute
       end
 
@@ -119,7 +119,7 @@ module MergeRequests
 
     def create_params(branch)
       params = {
-        assignee: current_user,
+        assignees: [current_user],
         source_branch: branch,
         source_project: project,
         target_branch: push_options[:target] || target_project.default_branch,

spec/services/merge_requests/push_options_handler_service_spec.rb

@@ -38,7 +38,7 @@ describe MergeRequests::PushOptionsHandlerService do
     it 'assigns the MR to the user' do
       service.execute
 
-      expect(last_mr.assignee).to eq(user)
+      expect(last_mr.assignees).to contain_exactly(user)
     end
 
     context 'when project has been forked' do