默认属性不可删除

app/Services/ParkingSpaceAttributesService.php

@@ -117,6 +117,9 @@ class ParkingSpaceAttributesService
             DB::beginTransaction();
 
             $model = ParkingSpaceAttributes::query()->findOrFail($id);
+            if ($model['is_default'] == 1) {
+                throw new Exception(__('admin.delete_failed'));
+            }
 
             $this->logService->logDeleted($model, 'space_attributes.delete');