from .shared import PYDANTIC_V2 as PYDANTIC_V2
from .shared import PYDANTIC_VERSION_MINOR_TUPLE as PYDANTIC_VERSION_MINOR_TUPLE
from .shared import annotation_is_pydantic_v1 as annotation_is_pydantic_v1
from .shared import field_annotation_is_scalar as field_annotation_is_scalar
from .shared import is_pydantic_v1_model_class as is_pydantic_v1_model_class
from .shared import is_pydantic_v1_model_instance as is_pydantic_v1_model_instance
from .shared import (

import fastapi
from fastapi._compat import (
    BaseConfig,
    ModelField,
    PydanticSchemaGenerationError,
    Undefined,
    UndefinedType,
    Validator,
    annotation_is_pydantic_v1,
)
from fastapi.datastructures import DefaultPlaceholder, DefaultType
from fastapi.exceptions import FastAPIDeprecationWarning, PydanticV1NotSupportedError
from pydantic import BaseModel

    with warnings.catch_warnings():
        warnings.simplefilter("ignore", UserWarning)
        from pydantic import v1
    return lenient_issubclass(cls, v1.BaseModel)


def annotation_is_pydantic_v1(annotation: Any) -> bool:
    if is_pydantic_v1_model_class(annotation):
        return True
    origin = get_origin(annotation)
    if origin is Union or origin is UnionType: