raise error in pydantic v1

fastapi/_compat/v1.py

@@ -348,3 +348,7 @@ def create_body_model(
 
 def get_model_fields(model: Type[BaseModel]) -> List[ModelField]:
     return list(model.__fields__.values())  # type: ignore[attr-defined]
+
+def omit_by_default(field_info: FieldInfo) -> FieldInfo:
+    """add a wrap validator to omit invalid values by default."""
+    raise NotImplementedError("This function is a placeholder in Pydantic v1.")

fastapi/params.py

@@ -305,7 +305,6 @@ class Query(Param):  # type: ignore[misc]
             json_schema_extra=json_schema_extra,
             **extra,
         )
-        self.annotation = self.annotation
 
 
 class Header(Param):  # type: ignore[misc]