From 3e0b6ccf75e1dd320751c1e6fd0e00e9de85dfe4 Mon Sep 17 00:00:00 2001
From: Philipp Kitzberger <coding@kitze.net>
Date: Tue, 1 Aug 2023 13:17:22 +0200
Subject: [PATCH] [BUGFIX] Prevent indexing error on missing
 'foreignLabelField' of SOLR_RELATION

Related: #3734
---
 Classes/ContentObject/Relation.php | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Classes/ContentObject/Relation.php b/Classes/ContentObject/Relation.php
index e0f86d0e75..3764dd17e6 100644
--- a/Classes/ContentObject/Relation.php
+++ b/Classes/ContentObject/Relation.php
@@ -352,7 +352,8 @@ protected function resolveRelatedValue(
             // adjust configuration for next level
             $this->configuration['localField'] = $foreignTableLabelField;
             $parentContentObject->data = $relatedRecord;
-            if (strpos($this->configuration['foreignLabelField'], '.') !== false) {
+            if (isset($this->configuration['foreignLabelField']) &&
+                strpos($this->configuration['foreignLabelField'], '.') !== false) {
                 list(, $this->configuration['foreignLabelField']) = explode(
                     '.',
                     $this->configuration['foreignLabelField'],