from typing import Any, Callable, Iterable, Type from starlette.datastructures import UploadFile as StarletteUploadFile class UploadFile(StarletteUploadFile): @classmethod def __get_validators__(cls: Type["UploadFile"]) -> Iterable[Callable]: yield cls.validate @classmethod def validate(cls: Type["UploadFile"], v: Any) -> Any: if not isinstance(v, StarletteUploadFile): raise ValueError(f"Expected UploadFile, received: {type(v)}") return v