Merge branch '4084-epics-username-autocomplete-ce' into 'master'

Backport CE changes from "autocomplete usernames in Epic comments/description"

See merge request gitlab-org/gitlab-ce!18605

1 files changed, 7 insertions, 0 deletions

diff --git a/app/models/namespace.rb b/app/models/namespace.rb
index 5621eeba7c4..3dad4277713 100644
--- a/app/models/namespace.rb
+++ b/app/models/namespace.rb
@@ -166,6 +166,13 @@ class Namespace < ActiveRecord::Base
     projects.with_shared_runners.any?
   end
 
+  # Returns all ancestors, self, and descendants of the current namespace.
+  def self_and_hierarchy
+    Gitlab::GroupHierarchy
+      .new(self.class.where(id: id))
+      .all_groups
+  end
+
   # Returns all the ancestors of the current namespaces.
   def ancestors
     return self.class.none unless parent_id