fix delete ids compute

Author: mvorisek

src/Form/Control/Multiline.php

@@ -331,20 +331,23 @@ public function setInputValue(string $value): void
             }
         }
 
+        $refModelOrEntity = $this->entityField->getField()->hasReference()
+            ? $this->entityField->getField()->getReference()->ref($this->entityField->getEntity())
+            : $this->model;
+
         $changes = new TheirChanges();
-        $model = $this->model;
 
         // TODO this is dangerous, deleted row IDs should be passed from UI
-        $idsToDelete = array_filter(array_column($rowData, $model->idField), static fn ($v) => $v !== null);
-        foreach ($model->createIteratorBy($model->idField, 'not in', $idsToDelete) as $entity) {
-            $changes->deletes[] = [$model->idField => $entity->getId()];
+        $idsToDelete = array_filter(array_column($rowData, $refModelOrEntity->idField), static fn ($v) => $v !== null);
+        foreach ($refModelOrEntity->getModel(true)->createIteratorBy($refModelOrEntity->idField, 'not in', $idsToDelete) as $entity) {
+            $changes->deletes[] = [$refModelOrEntity->idField => $entity->getId()];
         }
 
         foreach ($rowData as $row) {
-            if ($row[$model->idField] === null) {
+            if ($row[$refModelOrEntity->idField] === null) {
                 $changes->inserts[] = $row;
             } else {
-                $changes->updates[] = [[$model->idField => $row[$model->idField]], $row];
+                $changes->updates[] = [[$refModelOrEntity->idField => $row[$refModelOrEntity->idField]], $row];
             }
         }