37908 - catch empty nodes

ILIAS-eLearning · Sep 14, 2023 · b8d953b · b8d953b
1 parent 3c3c508
commit b8d953b
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/Services/Tree/classes/class.ilNestedSetTree.php b/Services/Tree/classes/class.ilNestedSetTree.php
@@ -154,6 +154,9 @@ public function getSubTreeQuery(
      */
     public function getRelation(array $a_node_a, array $a_node_b): int
     {
+        if ($a_node_a === [] || $a_node_b === []) {
+            return ilTree::RELATION_NONE;
+        }
         if ($a_node_a['child'] == $a_node_b['child']) {
             return ilTree::RELATION_EQUALS;
         }