我是nodejs和mysql的新手。我有一个从post得到的对象数组，希望将其插入mysql数据库。如果数据已经存在，那么运行数据库更新查询。问题是insert query没有循环整个数组。它只是插入数组的最后一个条目。这是我的密码：
数组数据：bukukasdata

[{transactionid: '562018965521', 
tanggal: '2018-06-05', 
kodeakun: 0, item: 'Saldo', 
debit: 100000, credit: 0, 
saldo: 100000},
{transactionid:'562018595664', 
tanggal:'2018-06-05', 
kodeakun: 0, 
item: 'Test Data', 
debit: 0, 
credit: 5000, 
saldo:95000}]

nodejs查询

app.post('/api/addbukukas', function(req, res) {
    let bukukasData = req.body.bukukasData;
    var status = '';
    for (var i = 0; i < bukukasData.length; i++) {
        var transactionid = req.body.bukukasData[i].transactionid;
        var kodeakun = req.body.bukukasData[i].kodeakun;
        var item = req.body.bukukasData[i].item;
        var debit = req.body.bukukasData[i].debit;
        var credit = req.body.bukukasData[i].credit;
        var saldo = req.body.bukukasData[i].saldo;
        var tanggal = req.body.bukukasData[i].tanggal;

        db.query('SELECT COUNT (*) AS rowCount FROM bukukas WHERE transactionid = ?', [req.body.bukukasData[i].transactionid], function(error, result) {

            var rows = result[0].rowCount;
            if (rows > 0) {
                db.query('UPDATE bukukas SET transactionid=?, kodeakun=?, tanggal=?, item=?, debit=?, credit=?, saldo=?  WHERE transactionid = ?', [transactionid, kodeakun, tanggal, item, debit, credit, saldo, transactionid],
                    function(err, result) {
                        if (err) {

                            status = 'Update Gagal';
                        } else {
                            status = 'Update Success';
                        }
                    })
            } else {
                db.query('INSERT INTO bukukas (transactionid, kodeakun, tanggal, item, debit, credit, saldo) VALUES (?,?,?,?,?,?,?)', [transactionid, kodeakun, tanggal, item, debit, credit, saldo], function(err, insertresult) {

                    if (err) {
                        status = 'Insert Gagal';
                    } else {
                        status = "insertresult";
                    }
                })
            }

        })
    }
    console.log(status);
    return res.json({ status: status });
});

使用此代码，插入到数据库的唯一数据就是数组中的最后一个数据。如何将数组中的所有数据插入数据库？谢谢