Merge branch 'main' into pr/466

src/Components/Form.php

@@ -369,16 +369,14 @@ private function getAttachedKeysFromRelation(string $relationName): ?array
         $relation = $this->model->{$relationName}();
 
         if ($relation instanceof BelongsToMany) {
-            $relatedKeyName = $relation->getRelatedKeyName();
-
-            return $loadedRelation->pluck($relatedKeyName)
+            return $loadedRelation->pluck($relation->getRelatedKeyName())
+                ->map(fn ($key) => (string) $key)
                 ->all();
         }
 
         if ($relation instanceof MorphMany) {
-            $parentKeyName = $relation->getLocalKeyName();
-
-            return $loadedRelation->pluck($parentKeyName)
+            return $loadedRelation->pluck($relation->getLocalKeyName())
+                ->map(fn ($key) => (string) $key)
                 ->all();
         }