Function test_fastapi_compatibility_hack

tests/test_fields.py:269–284

()

def test_fastapi_compatibility_hack() -> None:
    class Body(FieldInfo):
        """A reproduction of the FastAPI's `Body` param."""

    field = Body()
    # Assigning after doesn't update `_attributes_set`, which is currently
    # relied on to merge `FieldInfo` instances during field creation.
    # This is also what the FastAPI code is doing in some places.
    # The FastAPI compatibility hack makes it so that it still works.
    field.default = 1

    Model = create_model('Model', f=(int, field))
    model_field = Model.model_fields['f']

    assert isinstance(model_field, Body)
    assert not model_field.is_required()


_unsupported_standalone_fieldinfo_attributes = (