[英]How to insert bulk JSON data with node.js?
我在這里想要實現的是我想將此JSON插入我的數據庫,這是我的數據庫正在使用sql server。 我有大量的json數據,其中包含作為json樹的詳細信息。 以下是JSON數據,我要插入
[
{
No_BPS:'BSWEB12345',
Kd_Plg:'MMIM026',
Nm_Plg:'YAOMING',
Tgl_BPS:'2017-02-27T08:39:38.971Z',
Entry_Time:'2017-02-27T08:39:38.971Z',
User_Name:'tes',
Status:'Y',
Kd_Teknisi:'tes',
No_Ref:'RIRIMIMI609-001',
detailsData:[
{
No_BPS:'BSWEB12345',
Kd_Brg:'RH-C779-SB',
Qty:2,
Alasan:'undefined',
Keterangan:'undefined'
}
]
},
{
No_BPS:'BSWEB99999',
Kd_Plg:'PTPS053',
Nm_Plg:'WARLORD',
Tgl_BPS:'2017-02-27T08:40:04.082Z',
Entry_Time:'2017-02-27T08:40:04.082Z',
User_Name:'tes',
Status:'Y',
Kd_Teknisi:'tes',
No_Ref:'PTKP1210-001',
detailsData:[
{
No_BPS:'BSWEB99999',
Kd_Brg:'PS-230BIT SNI',
Qty:1,
Alasan:'undefined',
Keterangan:'undefined'
},
{
No_BPS:'BSWEB99999',
Kd_Brg:'PS-130BIT SNI',
Qty:1,
Alasan:'undefined',
Keterangan:'undefined'
}
]
}
]
這是我的nodejs代碼:
exports.insert_BPS = function(req, resp) {
console.log(req.body);
req.body.map(headerdata=>
{
var sql = `INSERT INTO TblBPSHeader (
No_BPS, Kd_Plg, Tgl_BPS, Entry_Time, User_Name, Status, Kd_Teknisi) values
('` + headerdata.No_BPS + `',
'` + headerdata.Kd_Plg + `',
'` + dateFormat(headerdata.Tgl_BPS, "yyyy-mm-dd' 'HH:MM:ss") + `',
'` + dateFormat(headerdata.Entry_Time, "yyyy-mm-dd' 'HH:MM:ss") + `',
'` + headerdata.User_Name + `',
'` + headerdata.Status + `',
'` + headerdata.Kd_Teknisi + `')`
db.executeSql(sql, function(data, err) {
if (err) {
httpMsgs.show500(req, resp, err);
} else {
// httpMsgs.send200(req, resp);
console.log('header inserted');
};
});
Promise.all(headerdata.detailsData.map
(detaildata =>
{
console.log(detaildata);
var sqldetail = `INSERT INTO TblBPSDetail (
No_BPS, kd_Brg, Qty, Alasan, Keterangan) values
('` + detaildata.No_BPS + `',
'` + detaildata.Kd_Brg + `',
'` + detaildata.Qty + `',
'` + detaildata.Alasan + `',
'` + detaildata.Keterangan + `')`
db.executeSql(sqldetail, function(data, err) {
if (err) {
httpMsgs.show500(req, resp, err);
} else {
// httpMsgs.send200(req, resp);
console.log('detail inserted');
};
});
}
)
)
}
)
};
但事實證明,數據已插入但正在復制,它總是在以下情況下循環數據:首次插入數據后成功插入了所有數據,但是當我離開片刻后,它會再次自我插入,因此數據將重復並導致重復錯誤。 如何正確插入批量數據json?
猜測您希望Promises使此代碼正常工作,盡管您的代碼似乎實際上並沒有真正使用Promises-盡管其中隨機存在Promise.all
。
首先,要使用Promises,您將需要一個“承諾的” exectueSql
一旦獲得了,其余的實際上很簡單
exports.insert_BPS = function(req, resp) {
// a promisified executeSql
let executeSql = (db, sql) => new Promise((resolve, reject) => db.executeSql(sql, (err, data) => {
if (err) {
return reject(err);
}
resolve(data);
}));
return Promise.all(req.body.map(headerdata => {
var sql = `INSERT INTO TblBPSHeader (
No_BPS, Kd_Plg, Tgl_BPS, Entry_Time, User_Name, Status, Kd_Teknisi) values
('` + headerdata.No_BPS + `',
'` + headerdata.Kd_Plg + `',
'` + dateFormat(headerdata.Tgl_BPS, "yyyy-mm-dd' 'HH:MM:ss") + `',
'` + dateFormat(headerdata.Entry_Time, "yyyy-mm-dd' 'HH:MM:ss") + `',
'` + headerdata.User_Name + `',
'` + headerdata.Status + `',
'` + headerdata.Kd_Teknisi + `')`
return executeSql(db, sql)
.then(() => Promise.all(headerdata.detailsData.map(detaildata => {
var sqldetail = `INSERT INTO TblBPSDetail (
No_BPS, kd_Brg, Qty, Alasan, Keterangan) values
('` + detaildata.No_BPS + `',
'` + detaildata.Kd_Brg + `',
'` + detaildata.Qty + `',
'` + detaildata.Alasan + `',
'` + detaildata.Keterangan + `')`
return executeSql(db, sqldetail);
})));
})).then(results => {
// all done here
httpMsgs.send200(req, resp);
}).catch(reason => {
httpMsgs.show500(req, resp, reason);
});
};
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