48 lines
1.4 KiB
Python
48 lines
1.4 KiB
Python
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from typing import Any, Callable, Iterable, Type, TypeVar
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from starlette.datastructures import State as State # noqa: F401
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from starlette.datastructures import UploadFile as StarletteUploadFile
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class UploadFile(StarletteUploadFile):
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@classmethod
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def __get_validators__(cls: Type["UploadFile"]) -> Iterable[Callable[..., Any]]:
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yield cls.validate
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@classmethod
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def validate(cls: Type["UploadFile"], v: Any) -> Any:
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if not isinstance(v, StarletteUploadFile):
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raise ValueError(f"Expected UploadFile, received: {type(v)}")
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return v
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class DefaultPlaceholder:
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"""
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You shouldn't use this class directly.
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It's used internally to recognize when a default value has been overwritten, even
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if the overriden default value was truthy.
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"""
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def __init__(self, value: Any):
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self.value = value
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def __bool__(self) -> bool:
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return bool(self.value)
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def __eq__(self, o: object) -> bool:
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return isinstance(o, DefaultPlaceholder) and o.value == self.value
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DefaultType = TypeVar("DefaultType")
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def Default(value: DefaultType) -> DefaultType:
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"""
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You shouldn't use this function directly.
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It's used internally to recognize when a default value has been overwritten, even
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if the overriden default value was truthy.
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"""
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return DefaultPlaceholder(value) # type: ignore
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