From 77339b7e75b967af425347d555a7b1a32988bc37 Mon Sep 17 00:00:00 2001
From: Maxime Rainville <maxime@silverstripe.com>
Date: Wed, 26 Sep 2018 17:24:06 +1200
Subject: [PATCH] MINOR Add caching to the TreeDropdownField tree action

---
 src/Forms/TreeDropdownField.php | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/Forms/TreeDropdownField.php b/src/Forms/TreeDropdownField.php
index f96379c75..97df4b679 100644
--- a/src/Forms/TreeDropdownField.php
+++ b/src/Forms/TreeDropdownField.php
@@ -453,6 +453,8 @@ class TreeDropdownField extends FormField
         /** @var DataObject|Hierarchy $obj */
         $obj = null;
         $sourceObject = $this->getSourceObject();
+
+        Hierarchy::prepopulate_numchildren_cache($sourceObject);
         if ($id && !$request->requestVar('forceFullTree')) {
             $obj = DataObject::get_by_id($sourceObject, $id);
             $isSubTree = true;