Method values_are_not_string

tests/test_validators.py:1869–1872

(cls, values: dict[str, Any])

            @root_validator(pre=True)
            def values_are_not_string(cls, values: dict[str, Any]) -> dict[str, Any]:
                if any(isinstance(x, str) for x in values.values()):
                    raise ValueError('values cannot be a string')
                return values

    m = Model(current=100, max_value=200)
    with pytest.raises(ValidationError) as exc_info: