cocainecong / go-seckill Goto Github PK

func WithPccReadSecKillGoods(gid, userID int) error {
	tx := model.DB.Begin()
	skGood := model.PromotionSecKill{}
	tx.Debug().Raw("SELECT * FROM `promotion_sec_kill` WHERE goods_id= ？ ORDER BY `promotion_sec_kill`.`ps_id` LIMIT 1 FOR UPDATE", gid).First(&skGood)
	count := skGood.PsCount
	if count > 0 {
		// 1. 扣库存
		tx.Debug().Exec("UPDATE `promotion_sec_kill` SET `ps_count`= ? WHERE goods_id= ?", count-1, gid)
		// 2. 创建订单
	}
	tx.Commit()
	return nil
}