我正在使用 node.js 和 mysql 。我想通过事务在表中插入/更新数据，因为只有在某些情况下，我才想插入/更新数据。为此，我将池和连接与事务一起使用。下面的代码在表中的插入/更新数据上工作正常。问题是插入/更新后我使用connection.release（）释放连接。但是连接未正确释放。
var jsonResponse = JSON.stringify
({
Data: ''
});
var AgholdId = 0;
var DocId = req.body.params.DocId;
pool.getConnection(function (err, connection) {
connection.beginTransaction(function (err) {
if (err) { throw err; }
async.series([ function
function (callback) {
try {
if (req.body.params.AgholdAction == "Add" && req.body.params.AgholdId == 0) {
query = "CALL spAgholdInsert(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
var param = [ req.body.params.StatusId , req.body.params.PRNId , req.body.params.MAWBId, req.body.params.Pieces , req.body.params.FullBoxEqv,
req.body.params.Quantity , req.body.params.ItemName, req.body.params.ItemId, req.body.params.AgholdDocId,
req.body.params.MAWBDocId, req.body.params.HAWBNumber, req.body.params.GTSInvoiceId ,
DocId, req.body.params.InvoiceNumber, req.body.params.EightBox, req.body.params.HalfBox, req.body.params.QuarterBox, req.body.params.FullBox, req.body.params.UOM, req.session.ClientId, formatteddatetime , req.session.UserId,
formatteddatetime , req.session.UserId
];
connection.query(query, param, function (err, result) {
if (err) {
connection.rollback();
jsonResponse = JSON.stringify({
Data: err.message,
Status: 'Invalid'
});
connection.release();
res.end(jsonResponse);
}
else {
AgholdId = result[0][0].AgholdId;
Action = "Add";
callback();
}
});
}
else if (req.body.params.AgholdAction == "Edit" && req.body.params.AgholdId > 0) {
query = "CALL spAgholdUpdate(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?)";
var param = [ req.body.params.PRNId , req.body.params.MAWBId, req.body.params.Pieces , req.body.params.FullBoxEqv,
req.body.params.Quantity , req.body.params.ItemName , req.body.params.ItemId,
req.body.params.MAWBDocId, req.body.params.HAWBNumber, req.body.params.GTSInvoiceId ,
DocId, req.body.params.InvoiceNumber, req.body.params.EightBox, req.body.params.HalfBox, req.body.params.QuarterBox, req.body.params.FullBox, req.body.params.UOM, req.session.ClientId ,
formatteddatetime, req.session.UserId, req.body.params.AgholdId, req.body.params.IsUpload
];
connection.query(query, param, function (err, result) {
if (err) {
connection.rollback();
jsonResponse = JSON.stringify({
Data: err.message,
Status: 'Invalid'
});
connection.release();
res.end(jsonResponse);
}
else {
AgholdId = 0;
Action = "Update";
callback();
}
});
}
}
catch (excb4) {
var jsonResponse = JSON.stringify({
Data: excb4.message,
Status: 'Invalid'
});
connection.release();
res.end(jsonResponse);
}
},
function (callback) {
connection.commit(function (err) {
if (err) {
connection.rollback();
jsonResponse = JSON.stringify({
Data: err.message,
Status: 'Invalid'
});
}
else{
console.log('Transaction Complete.');
jsonResponse = JSON.stringify({
Data: 'Record inserted successfully',
Status: 'Valid',
AgholdId: AgholdId,
Action: Action
});
}
connection.release();
res.end(jsonResponse);
});
}
]);
});
});