Split up adding ancestors for projects

app/finders/group_descendants_finder.rb

@@ -61,14 +61,19 @@ class GroupDescendantsFinder
 
     paginated_projects = paginate_projects_after_groups(subgroups_with_counts)
 
-    if params[:filter]
-      ancestors_for_project_search = ancestors_for_groups(Group.where(id: paginated_projects.select(:namespace_id)))
-      subgroups_with_counts = ancestors_for_project_search.with_route.select(GROUP_SELECTS) | subgroups_with_counts
-    end
+    subgroups_with_counts = add_project_ancestors_when_searching(subgroups_with_counts, paginated_projects)
 
     @children = subgroups_with_counts + paginated_projects
   end
 
+  def add_project_ancestors_when_searching(groups, projects)
+    return groups unless params[:filter]
+
+    project_ancestors = ancestors_for_projects(projects)
+                          .with_route.select(GROUP_SELECTS)
+    groups | project_ancestors
+  end
+
   def paginate_projects_after_groups(loaded_subgroups)
     # We adjust the pagination for projects for the combination with groups:
     # - We limit the first page (page 0) where we show  projects:
@@ -138,6 +143,10 @@ class GroupDescendantsFinder
       .base_and_ancestors.where.not(id: ancestors_for_parent)
   end
 
+  def ancestors_for_projects(projects)
+    ancestors_for_groups(Group.where(id: projects.select(:namespace_id)))
+  end
+
   def subgroups
     return Group.none unless Group.supports_nested_groups?
     return Group.none unless can?(current_user, :read_group, parent_group)