Rails5 fix passing Group objects array into for_projects_and_groups milestone scope

ee/app/finders/boards/milestones_finder.rb

@@ -17,12 +17,12 @@ module Boards
       finder_params =
         if parent.is_a?(Group)
           {
-            group_ids: parent.self_and_ancestors
+            group_ids: parent.self_and_ancestors_ids
           }
         else
           {
             project_ids: [parent.id],
-            group_ids: parent.group&.self_and_ancestors
+            group_ids: parent.group&.self_and_ancestors_ids
           }
         end
 

ee/changelogs/unreleased/rails5-fix-board-milestone-finder.yml

+---
+title: Rails5 fix passing Group objects array into for_projects_and_groups milestone
+  scope
+merge_request: 6873
+author: Jasper Maes
+type: fixed