Yii2操作redis的sadd方法

//将参与活动的门店信息入redis库
    public static function savesaddredis($ai_id,$shop_id)
    {
        $activity_shop_Key = 'activity_'.$ai_id."_shops";
        if (!Yii::$app->redis->sadd($activity_shop_Key, $shop_id)) {
            log::writeLog("参与活动的门店信息保存到redis中失败:" . $activity_shop_Key,'tv');
        }
        //设置有效期为1天
        Yii::$app->redis->expire($activity_shop_Key,172800);
        return true;
    }