Node.js mysql transaction

Question

Can anyone provide an example of how I could achieve MySQL transactions in Node.js. I am trying to get my head around using the node-mysql driver and node-mysql-queue.

Answer 1

I have come up with a solution using a recursive function.

var sql = 'INSERT INTO logs SET data = ?';

// array of rows to insert
var rows = [[/*first row*/], [/*additional row*/]];

connection.beginTransaction(function (err) {

    if (err) { 
        throw err; 
    }

    var insertEachRow = function () {

        var row = rows.shift();

        if (! row) {
            // Done, now commit
            return noMoreRows();
        }

        connection.query(sql, row, function (err, result) {
            if (err) { 
                connection.rollback(function () {
                    throw err;
                });
            }  

            insertEachRow();
        });
    };

    var noMoreRows = function () {
        connection.commit(function (err) {
            if (err) { 
                connection.rollback(function () {
                    throw err;
                });
            }
            console.log('success!');
        });
    };

    insertEachRow();
});