pythonasyncioapiasyncfastapiframeworkjsonjson-schemaopenapiopenapi3pydanticpython-typespython3redocreststarletteswaggerswagger-uiuvicornweb
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40 lines
1.2 KiB
40 lines
1.2 KiB
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"""
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Internal v1-params shim. Will be removed when v1 is dropped.
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This module provides compatibility shims for Pydantic v1 FieldInfo/Param types
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to support isinstance() checks without importing pydantic.v1 at import-time.
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Used internally by FastAPI for backward compatibility.
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"""
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from __future__ import annotations
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from typing import Any
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_SENTINEL = object()
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def _v1() -> Any:
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"""Lazy import of v1 module to avoid warnings."""
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from . import v1 # lazy proxy; only warns/errors if actually using v1
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return v1
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class _BaseParam:
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"""Minimal wrapper that delegates to v1.FieldInfo without importing v1 at import-time."""
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def __init__(self, default: Any = _SENTINEL, **kwargs: Any):
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v1 = _v1()
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if default is _SENTINEL:
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default = getattr(v1, 'Undefined', None)
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self._fi = v1.FieldInfo(default=default, **kwargs)
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def __getattr__(self, name: str) -> Any:
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return getattr(self._fi, name)
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# Types used in isinstance() checks in core
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class Param(_BaseParam): ...
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class Body(_BaseParam): ...
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class Form(Body): ...
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class File(Form): ...
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class Path(Param): ...
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class Query(Param): ...
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class Header(Param): ...
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class Cookie(Param): ...
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