From f12fa62ad60e643bb93cc191f77cc75404b6a25c Mon Sep 17 00:00:00 2001
From: Sam Minnee <sam@silverstripe.com>
Date: Mon, 8 Apr 2019 18:09:51 +1200
Subject: [PATCH] FIX: Better error message when GridFieldLevelup passed bad
 record details

Fixes https://github.com/silverstripe/silverstripe-framework/issues/3519
---
 src/Forms/GridField/GridFieldLevelup.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Forms/GridField/GridFieldLevelup.php b/src/Forms/GridField/GridFieldLevelup.php
index 84d92af19..6e653ee76 100644
--- a/src/Forms/GridField/GridFieldLevelup.php
+++ b/src/Forms/GridField/GridFieldLevelup.php
@@ -62,6 +62,11 @@ class GridFieldLevelup implements GridField_HTMLProvider
 
         /** @var DataObject|Hierarchy $modelObj */
         $modelObj = DataObject::get_by_id($modelClass, $this->currentID);
+        if (!$modelObj) {
+            throw new \LogicException(
+                "Can't find object of class $modelClass ID #{$this->currentID} for GridFieldLevelup"
+            );
+        }
 
         $parent = null;
         if ($modelObj->hasMethod('getParent')) {