types.py 文件源码

def validate(cls, value, minimum=None, maximum=None):
        if value is None:
            return None

        if not isinstance(value, six.integer_types):
            try:
                value = int(value)
            except Exception:
                LOG.exception('Failed to convert value to int')
                raise exception.InvalidValue(value=value, type=cls.type_name)

        if minimum is not None and value < minimum:
            message = _("Integer '%(value)s' is smaller than "
                        "'%(min)d'.") % {'value': value, 'min': minimum}
            raise exception.InvalidValue(message=message)

        if maximum is not None and value > maximum:
            message = _("Integer '%(value)s' is large than "
                        "'%(max)d'.") % {'value': value, 'max': maximum}
            raise exception.InvalidValue(message=message)

        return value