fields.py 文件源码

def enforce_timezone(self, value):
        """
        When `self.default_timezone` is `None`, always return naive datetimes.
        When `self.default_timezone` is not `None`, always return aware datetimes.
        """
        field_timezone = getattr(self, 'timezone', self.default_timezone())

        if (field_timezone is not None) and not timezone.is_aware(value):
            try:
                return timezone.make_aware(value, field_timezone)
            except InvalidTimeError:
                self.fail('make_aware', timezone=field_timezone)
        elif (field_timezone is None) and timezone.is_aware(value):
            return timezone.make_naive(value, utc)
        return value