5 files changed, 29 insertions, 14 deletions
diff --git a/app/finders/admin/projects_finder.rb b/app/finders/admin/projects_finder.rb
index 2c8f21c2400..53b77f5fed9 100644
--- a/app/finders/admin/projects_finder.rb
+++ b/app/finders/admin/projects_finder.rb
@@ -62,6 +62,6 @@ class Admin::ProjectsFinder
 
   def sort(items)
     sort = params.fetch(:sort) { 'latest_activity_desc' }
-    items.sort(sort)
+    items.sort_by_attribute(sort)
   end
 end
diff --git a/app/finders/issuable_finder.rb b/app/finders/issuable_finder.rb
index b2d4f9938ff..61c72aa22a8 100644
--- a/app/finders/issuable_finder.rb
+++ b/app/finders/issuable_finder.rb
@@ -337,7 +337,7 @@ class IssuableFinder
   def sort(items)
     # Ensure we always have an explicit sort order (instead of inheriting
     # multiple orders when combining ActiveRecord::Relation objects).
-    params[:sort] ? items.sort(params[:sort], excluded_labels: label_names) : items.reorder(id: :desc)
+    params[:sort] ? items.sort_by_attribute(params[:sort], excluded_labels: label_names) : items.reorder(id: :desc)
   end
 
   def by_assignee(items)
diff --git a/app/finders/labels_finder.rb b/app/finders/labels_finder.rb
index 780c0fdb03e..afd1f824b32 100644
--- a/app/finders/labels_finder.rb
+++ b/app/finders/labels_finder.rb
@@ -28,9 +28,10 @@ class LabelsFinder < UnionFinder
       if project
         if project.group.present?
           labels_table = Label.arel_table
+          group_ids = group_ids_for(project.group)
 
           label_ids << Label.where(
-            labels_table[:type].eq('GroupLabel').and(labels_table[:group_id].eq(project.group.id)).or(
+            labels_table[:type].eq('GroupLabel').and(labels_table[:group_id].in(group_ids)).or(
               labels_table[:type].eq('ProjectLabel').and(labels_table[:project_id].eq(project.id))
             )
           )
@@ -38,11 +39,14 @@ class LabelsFinder < UnionFinder
           label_ids << project.labels
         end
       end
-    elsif only_group_labels?
-      label_ids << Label.where(group_id: group_ids)
     else
+      if group?
+        group = Group.find(params[:group_id])
+        label_ids << Label.where(group_id: group_ids_for(group))
+      end
+
       label_ids << Label.where(group_id: projects.group_ids)
-      label_ids << Label.where(project_id: projects.select(:id))
+      label_ids << Label.where(project_id: projects.select(:id)) unless only_group_labels?
     end
 
     label_ids
@@ -59,22 +63,33 @@ class LabelsFinder < UnionFinder
     items.where(title: title)
   end
 
-  def group_ids
+  # Gets redacted array of group ids
+  # which can include the ancestors and descendants of the requested group.
+  def group_ids_for(group)
     strong_memoize(:group_ids) do
-      groups_user_can_read_labels(groups_to_include).map(&:id)
+      groups = groups_to_include(group)
+
+      groups_user_can_read_labels(groups).map(&:id)
     end
   end
 
-  def groups_to_include
-    group = Group.find(params[:group_id])
+  def groups_to_include(group)
     groups = [group]
 
-    groups += group.ancestors if params[:include_ancestor_groups].present?
-    groups += group.descendants if params[:include_descendant_groups].present?
+    groups += group.ancestors if include_ancestor_groups?
+    groups += group.descendants if include_descendant_groups?
 
     groups
   end
 
+  def include_ancestor_groups?
+    params[:include_ancestor_groups]
+  end
+
+  def include_descendant_groups?
+    params[:include_descendant_groups]
+  end
+
   def group?
     params[:group_id].present?
   end
diff --git a/app/finders/projects_finder.rb b/app/finders/projects_finder.rb
index 005612ededc..c7d6bc6cfdc 100644
--- a/app/finders/projects_finder.rb
+++ b/app/finders/projects_finder.rb
@@ -124,7 +124,7 @@ class ProjectsFinder < UnionFinder
   end
 
   def sort(items)
-    params[:sort].present? ? items.sort(params[:sort]) : items.order_id_desc
+    params[:sort].present? ? items.sort_by_attribute(params[:sort]) : items.order_id_desc
   end
 
   def by_archived(projects)
diff --git a/app/finders/todos_finder.rb b/app/finders/todos_finder.rb
index 150f4c7688b..09e2c586f2a 100644
--- a/app/finders/todos_finder.rb
+++ b/app/finders/todos_finder.rb
@@ -119,7 +119,7 @@ class TodosFinder
   end
 
   def sort(items)
-    params[:sort] ? items.sort(params[:sort]) : items.order_id_desc
+    params[:sort] ? items.sort_by_attribute(params[:sort]) : items.order_id_desc
   end
 
   def by_action(items)