Why do I get an empty object when a function is invoked in node.js?

Question

I have this app.get in my node.js Express Server.

  app.get(\'/api/court/:num\', function(req, res, next) {
    var courts = new C         


        

Answer 1

Your courtsAmount doesn't return anything. Instead you should use a callback inside it (or a promise), to do something like this:

this.courtsAmount = function(callback){
connection.query('SELECT COUNT(*) AS result from courts', function(err, rows, fields){
    if (err) throw err;
    connection.end();
    console.log(rows[0].result);
    callback(rows[0].result);
    });
  };

And

app.get('/api/court/:num', function(req, res, next) {
 var courts = new CourtsHandler;
 if (req.params.num == 0) //get array of all courts
   courts.courtsAmount(function(result) { res.send(200, result) });
});