sequelize 操作表時(shí)如何給表加鎖保證一致性？

聊天程序，用戶可以搶馬甲，如果兩個(gè)用戶同時(shí)搶，兩個(gè)用戶都會(huì)搶到這個(gè)馬甲，如何讓第一個(gè)用戶操作表時(shí)阻塞這個(gè)表？

像下面這樣的邏輯我該如何使用事務(wù)呢？

  rob_vest: async function (data, socket) {
        let vest_time = Date.now()
        console.log('時(shí)間錯(cuò)', vest_time)
        let sequlize = await db
        let phone = data.phone
        let room = data.room
        let url = data.url
        //查詢馬甲是否有人在使用
        let vest = await sequlize.models.user_vest.findOne({ where: { url: data.url, have_vest: 1, online: 1, room: room }, raw: true })
        let cool_vest = await sequlize.models.used_vest.findOne({ where: { phone, room, url }, raw: true })
        if (vest) {
            io.sockets.connected[socket.id].emit('rob_vest', { success: false, message: 'not avilable vest' })
            return
        }
        //判斷是否在冷卻時(shí)間
        if (!cool_vest) {
            console.log('*userd_time', vest_time)
            let used_time = vest_time
            console.log('userddddddddtime------------------', used_time)
            let data = await sequlize.models.used_vest.create({ phone, room, url, used_time })
        } else {
            let begin_time = cool_vest.used_time + 60 * 60 * 2 * 1000
            let stop_time = begin_time + 60 * 60 * 2 * 1000
            console.log(begin_time, vest_time, stop_time, '8989898989898', vest_time < stop_time && begin_time < vest_time)
            if (begin_time < vest_time && vest_time < stop_time) {
                io.sockets.connected[socket.id].emit('rob_vest', { success: false, msg: "馬甲在冷卻時(shí)間內(nèi)不可以搶奪" })
                return
            } else {

                let used_time = vest_time
                sequlize.models.used_vest.update({ used_time }, { where: { phone, room, url } })
            }
        }
        //更新用戶信息
        let update_user = await sequlize.models.chat_user.update({ have_vest: 1, url: data.url, vest_name: data.vest_name, vest_time: vest_time, room: room }, { where: { phone }, raw: true })
        // let update_vest = sequlize.models.chat_vest.update({ is_used: 1, used_time: vest_time }, { where: { url: data.url }, raw: true })
        if (update_user) {
            //搶馬甲成功向房間內(nèi)所有人廣播
            io.to(room).emit('rob_vest', { success: true, phone: phone })
            schedules.addListenVest(io)
        } else {
            //搶馬甲失敗，向用戶自己廣播失敗
            io.sockets.connected[socket.id].emit('rob_vest', { success: false, phone: phone })

        }
        }