From 6d885ab894acecf6b6b7bca1e6493df383ff8b71 Mon Sep 17 00:00:00 2001
From: Guy Sartorelli <guy.sartorelli@silverstripe.com>
Date: Thu, 25 Aug 2022 17:36:06 +1200
Subject: [PATCH] FIX Normalise casing before casting fields

---
 src/View/ViewableData.php | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/View/ViewableData.php b/src/View/ViewableData.php
index 2755b1da4..204b05964 100644
--- a/src/View/ViewableData.php
+++ b/src/View/ViewableData.php
@@ -319,9 +319,12 @@ class ViewableData implements IteratorAggregate
      */
     public function castingHelper($field)
     {
-        $specs = static::config()->get('casting');
-        if (isset($specs[$field])) {
-            return $specs[$field];
+        // Get casting if it has been configured.
+        // DB fields and PHP methods are all case insensitive so we normalise casing before checking.
+        $specs = array_change_key_case(static::config()->get('casting'), CASE_LOWER);
+        $fieldLower = strtolower($field);
+        if (isset($specs[$fieldLower])) {
+            return $specs[$fieldLower];
         }
 
         // If no specific cast is declared, fall back to failover.