validators.py 文件源码

def __call__(self, value):
        keys = set(value.keys())
        missing_keys = self.keys - keys
        if missing_keys:
            raise ValidationError(
                self.messages['missing_keys'],
                code='missing_keys',
                params={'keys': ', '.join(missing_keys)},
            )
        if self.strict:
            extra_keys = keys - self.keys
            if extra_keys:
                raise ValidationError(
                    self.messages['extra_keys'],
                    code='extra_keys',
                    params={'keys': ', '.join(extra_keys)},
                )