Question

我必须根据一些调用将一些数据保存在数据库中，因此我可以为此使用诺言，但是由于unhandled promise rejection出现错误，我不知道出了什么问题。

我有一个控制器，首先我要通过运行查询来检查某项，然后检查是否存在行，然后我要检查count如果count为0，则执行一个功能，否则要处理其他功能。

我的控制器

exports.dispenceCashback = function(req, res) {
    const phoneNo = req.body.phoneNo
    const billAmt = req.body.billAmt
    const cashBack = req.body.cashBack
    const billNo = req.body.billNo
    User.isValidConsumer(phoneNo)
        .then(([rows]) => {

        if (rows[0]) {   // if consumer valid / exist then go forward
            console.log(rows)
            let consumerName = rows[0].consumername

            User.checkRows(phoneNo)
                .then(([rows]) => {

                console.log(rows[0].count)
                if (rows[0].count == 0) {  // checking what is the count of row if 0 then executing this code
                    User.insertIntoDets(phoneNo, billAmt, cashBack, billNo, consumerName, retailerName, retailerId)
                    User.insertNew(phoneNo, billAmt, cashBack, consumerName)

                    } 
                    else {    //else do this functanility
                         User.insertIntoDets(phoneNo, billAmt, cashBack, billNo, consumerName, retailerName, retailerId)
                         User.update(phoneNo, billAmt, cashBack)
                    }
                })
                .catch(error => {
                    console.log(error)
                    return res.status(404).json({ error: 'Something went wrong' })
                })

            } 
            else {
                return res.status(404).json({ error: 'Ooooops!!!! invalid consumer' })
            }
        })
        .catch(err => console.log(err));
    }

关于上述代码，这是我运行查询的模型类

static isValidConsumer(phoneNo) {
    let sql = 'select *  from tpconsumer where consphoneno = ?'
    return db.execute(sql, [phoneNo]);
}

static checkRows(phoneNo) {
    let sql = 'select count(*) as count from cashbackdisp where consphoneno = ?'
    return db.execute(sql, [phoneNo]);
}

static insertIntoDets(phoneNo, billAmt, cashBack, billNo, consumerName, retailerName, retailerId) {

    console.log(retailerId, retailerName)
    let today = new Date();
    let dd = String(today.getDate()).padStart(2, '0');
    let mm = String(today.getMonth() + 1).padStart(2, '0');
    let yyyy = today.getFullYear();
    today = yyyy + '-' + mm + '-' + dd;

    let sql = 'INSERT INTO cashbackdispdets (consphoneno, consumername, businessid, businessname, billamt, cashbackamt, billno, billdate, billyear)VALUES(?, ?, ?, ?, ?, ?, ?, ?, ?,?)'
    return db.execute(sql, [phoneNo, consumerName, retailerId, retailerName, billAmt, cashBack, billNo, today, yyyy, 'Y']);
}

static insertNew(phoneNo, billAmt, cashBack, consumerName) {
    let sql = 'INSERT INTO cashbackdisp (consphoneno, consumername, curyearpurchasedamt, curyearcashbackamt) VALUES (?, ?, ?, ?)'
    return db.execute(sql, [phoneNo, consumerName, billAmt, cashBack]);
}

static update(phoneNo, billAmt, cashBack) {
    let sql = 'UPDATE cashbackdisp SET  curyearpurchasedamt = curyearpurchasedamt+ ' + billAmt + ',curyearcashbackamt = curyearcashbackamt + ' + cashBack + ' WHERE consphoneno = ?'
    console.log("sql  :" + sql)
    return db.execute(sql, [phoneNo]);

}

我已在控制器中注释了一些行，我正在做的事情是：

由于未处理的承诺拒绝减少而出错

0 个答案: