From b8563dadc02ecd390c550ba9a76180f65c53c3af Mon Sep 17 00:00:00 2001
From: Adam Hegyi <ahegyi@gitlab.com>
Date: Tue, 2 Jul 2019 08:19:46 +0000
Subject: [PATCH] Memoizing root_ancestor in Namespace

The root_ancestor method is heavily used in EE for the group_saml
feature. Having this memoization implemented in CE would eliminate
the need of overriding the root_ancestor method in EE.
---
 app/models/namespace.rb | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/app/models/namespace.rb b/app/models/namespace.rb
index f9b53b2b70a..bfa33dc86ac 100644
--- a/app/models/namespace.rb
+++ b/app/models/namespace.rb
@@ -250,7 +250,9 @@ class Namespace < ApplicationRecord
   end
 
   def root_ancestor
-    self_and_ancestors.reorder(nil).find_by(parent_id: nil)
+    strong_memoize(:root_ancestor) do
+      self_and_ancestors.reorder(nil).find_by(parent_id: nil)
+    end
   end
 
   def subgroup?