diff --git a/fastapi/_compat.py b/fastapi/_compat.py index 06b847b4f..4609cbe82 100644 --- a/fastapi/_compat.py +++ b/fastapi/_compat.py @@ -47,6 +47,7 @@ sequence_types = tuple(sequence_annotation_to_type.keys()) if PYDANTIC_V2: from pydantic import PydanticSchemaGenerationError as PydanticSchemaGenerationError + from pydantic.errors import PydanticUndefinedAnnotation as PydanticUndefinedAnnotation from pydantic import TypeAdapter from pydantic import ValidationError as ValidationError from pydantic._internal._schema_generation_shared import ( # type: ignore[attr-defined] @@ -358,6 +359,9 @@ else: class PydanticSchemaGenerationError(Exception): # type: ignore[no-redef] pass + class PydanticUndefinedAnnotation(Exception): # type: ignore[no-redef] + pass + def with_info_plain_validator_function( # type: ignore[misc] function: Callable[..., Any], *, diff --git a/fastapi/utils.py b/fastapi/utils.py index dfda4e678..eaa332709 100644 --- a/fastapi/utils.py +++ b/fastapi/utils.py @@ -20,6 +20,7 @@ from fastapi._compat import ( BaseConfig, ModelField, PydanticSchemaGenerationError, + PydanticUndefinedAnnotation, Undefined, UndefinedType, Validator, @@ -97,7 +98,7 @@ def create_response_field( ) try: return ModelField(**kwargs) # type: ignore[arg-type] - except (RuntimeError, PydanticSchemaGenerationError): + except (RuntimeError, PydanticSchemaGenerationError, PydanticUndefinedAnnotation): raise fastapi.exceptions.FastAPIError( "Invalid args for response field! Hint: " f"check that {type_} is a valid Pydantic field type. "