node-mysql

I am using node-mysql, node-js, and Q promises. I have successfully updated, deleted, and inserted single rows using the above. As well as inserted multiple rows in a single statement in my test case scenario. However, I need to update multiple rows with different values (batch mode) either in a single query or in a for loop. The information on how to use prepared statements in mysql2 (supposed to improve on node-mysql) is very sparse and there are no examples, although that should be the natural choice, together with promises to compensate for node-js asynchronous nature. In addition, I have

I've read several examples for using mysql in node.js and I have questions about the error handling. Most examples do error handling like this (perhaps for brevity): app.get('/countries', function(req, res) { pool.createConnection(function(err, connection) { if (err) { throw err; } connection.query(sql, function(err, results) { if (err) { throw err; } connection.release(); // do something with results }); }); }); This causes the server to crash every time there's an sql error. I'd like to avoid that and keep the server running. My code is like this: app.get('/countries', function(req, res) {

How can I check if no matching found in mysql (node.js)? mysql.query("select * from table1 where name = 'abcd'", function(error, result, field) { if(error) { exist(error); //No error } else if(result) { console.log(result); //displays '[]' exist(null, result); } else { exist(null, null); //It is never execute } }); function exist(error, result) { if(result) console.log("Test:"+result); //Executed and displays 'Test:' } My database does not contains name = 'abcd'. So, how can I check if the query does not match? Rodrigo Medeiros You're receiving an empty array ( [] ) as result of your query,

I'm still very new to Node.js, and i'm trying to understand how callbacks work. So, here is my problem : I should've put more code : POST : app.post('/register', function(req, res) { //get data from the request var data = { username: req.body.username, email: req.body.email, password: req.body.password }; function fetchID(callback) { connection.query('SELECT id_user FROM USERS WHERE username = ?', data.username, function(err, rows) { if (err) { callback(err, null); } else callback(null, rows[0].id_user); }); } var user_id; fetchID(function(err, content) { if (err) { console.log(err); return

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. As far are I can tell, using node-mysql-queue greatly reduces the asynchronous nature of Node.js as new queries have to wait until existing ones have completed. To get around this, has anyone attempted to combine node-mysql-queue with node-mysql's connection-pooling capabilities. i.e starting a new mysql connection for each new http request, and starting transaction queues on individual connections? The following transaction

I'm trying to reproduce a MySQL error I'm seeing in my node.js app on EC2 with the node mysql library : Connection lost: The server closed the connection. I am unable to reproduce the error locally- killing the database is handled just fine by my code- it just rechecks every few seconds and reconnects to the db once it is restarted. On EC2, it happens around 4am Pacific, but the db is still up and running fine. I'd like to Reproduce the crash with my local mysql Add whatever logic I need in my mysql helper module to handle this Here's the error in my node.js app: 2012-10-22T08:45:40.518Z -

I want to write an SQL query that contains a NodeJS variable. When I do this, it gives me an error of 'undefined'. I want the SQL query below to recognize the flightNo variable. How can a NodeJS variable be input into an SQL query? Does it need special characters around it like $ or ? . app.get("/arrivals/:flightNo?", cors(), function(req,res){ var flightNo = req.params.flightNo; connection.query("SELECT * FROM arrivals WHERE flight = 'flightNo'", function(err, rows, fields) { You will need to put the value of the variable into the SQL statement. This is no good: "SELECT * FROM arrivals WHERE

I have a basic Node JS server which is designed to be used as an API, I've created a log and database module and I've started adding other modules to deal with different request types. I'm using Express.js and node-mysql When I visit /v1/group I get the following error - TypeError: Cannot read property 'database' of undefined at Group.getAll (C:\code\javascript\node\api\api\v1\groups.js:12:23) at callbacks (C:\code\javascript\node\api\node_modules\express\lib\router\index.js:161:37) ... So I guess after recieving a request and calling group.getAll() that this is undefined but I don't