Fix type

strawberry-graphql · Jan 7, 2022 · a3e1379 · a3e1379
1 parent 0bcc522
commit a3e1379
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/strawberry/experimental/pydantic/utils.py b/strawberry/experimental/pydantic/utils.py
@@ -126,9 +126,9 @@ def ensure_all_auto_fields_in_pydantic(
     model: Type[BaseModel], auto_fields: Set[str], cls_name: str
 ) -> Union[NoReturn, None]:
     # Raise error if user defined a strawberry.auto field not present in the model
-    non_existing_fields = auto_fields - model.__fields__.keys()
+    non_existing_fields = list(auto_fields - model.__fields__.keys())
 
-    if len(non_existing_fields) > 0:
+    if non_existing_fields:
         raise AutoFieldsNotInBaseModelError(
             fields=non_existing_fields, cls_name=cls_name, model=model
         )