I'm trying to learn node and mongo in order to build a simple web app/teach myself a little bit more about web applications. However, when I call Model.save(), the continuation function never seems to execute, and the data isn't saved.

Here's what I have so far:

/* app.js */

var express = require('express')
  , app = express()
  , routes = require('./routes')
  , http = require('http')
  , path = require('path')
  , mongoose = require('mongoose')
  , db 
  , Track
  , models = require('./models.js');

app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'ejs');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.cookieParser('secretstuff'));
  app.use(express.session());
  app.use(app.router);
  app.use(require('less-middleware')({ src: __dirname + '/public' }));
  app.use(express.static(path.join(__dirname, 'public')));
  app.use(function(err, req, res, next){
    console.error(err.stack);
    res.send(500, 'Something broke!');
  });
});

models.defineModels(mongoose, function(){
  app.Track = Track = mongoose.model('Track');
  db = mongoose.createConnection('localhost','nextrak')
});

app.get('/', routes.index);

app.get('/dbTest', function(req, res){
  console.log("Here goes...");
  var t = new Track({
    name: "TestTrack",
    artist: "Artist",
    tags: ["test"],
    next: ["track1","track2"]
  });
  console.log("Test Track:");
  console.log(t);

  t.save(function(){
    if(err)
      console.log("Error! Couldn't complete dbTest successfully.");
    else
      console.log("Aw yiss, got dbTest working");
  })
});

http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});


/*models.js*/

function defineModels(mongoose, cont){
  var Schema = mongoose.Schema;
  Track = new Schema({
    'name': { type: String, index: true },
    'artist': String,
    'tags': [String],
    'next': [String],
  });
  mongoose.model('Track', Track);
  cont();
}

exports.defineModels = defineModels;

No errors are thrown, and the mongo logs indicate that 5 new connections are spun up when I launch my app. No new logs appear (except [clientcursormon] logs). The app prints out the following when I load /dbTest in Chrome:

Here goes...

  Test Track:
    { name: 'TestTrack',
      artist: 'Basik',
      _id: 5031606aa11cf95815000001,
      next: [ 'track1', 'track2' ],
      tags: [ 'test' ] }

Mongo appears to be configured correctly. When I have node run the simple "Getting Started" script that Mongoose walks you through, everything works correctly.

Can anyone point out what I'm doing incorrectly?

I'm trying to learn node and mongo in order to build a simple web app/teach myself a little bit more about web applications. However, when I call Model.save(), the continuation function never seems to execute, and the data isn't saved.

Here's what I have so far:

/* app.js */

var express = require('express')
  , app = express()
  , routes = require('./routes')
  , http = require('http')
  , path = require('path')
  , mongoose = require('mongoose')
  , db 
  , Track
  , models = require('./models.js');

app.configure(function(){
  app.set('port', process.env.PORT || 3000);
  app.set('views', __dirname + '/views');
  app.set('view engine', 'ejs');
  app.use(express.favicon());
  app.use(express.logger('dev'));
  app.use(express.bodyParser());
  app.use(express.methodOverride());
  app.use(express.cookieParser('secretstuff'));
  app.use(express.session());
  app.use(app.router);
  app.use(require('less-middleware')({ src: __dirname + '/public' }));
  app.use(express.static(path.join(__dirname, 'public')));
  app.use(function(err, req, res, next){
    console.error(err.stack);
    res.send(500, 'Something broke!');
  });
});

models.defineModels(mongoose, function(){
  app.Track = Track = mongoose.model('Track');
  db = mongoose.createConnection('localhost','nextrak')
});

app.get('/', routes.index);

app.get('/dbTest', function(req, res){
  console.log("Here goes...");
  var t = new Track({
    name: "TestTrack",
    artist: "Artist",
    tags: ["test"],
    next: ["track1","track2"]
  });
  console.log("Test Track:");
  console.log(t);

  t.save(function(){
    if(err)
      console.log("Error! Couldn't complete dbTest successfully.");
    else
      console.log("Aw yiss, got dbTest working");
  })
});

http.createServer(app).listen(app.get('port'), function(){
  console.log("Express server listening on port " + app.get('port'));
});


/*models.js*/

function defineModels(mongoose, cont){
  var Schema = mongoose.Schema;
  Track = new Schema({
    'name': { type: String, index: true },
    'artist': String,
    'tags': [String],
    'next': [String],
  });
  mongoose.model('Track', Track);
  cont();
}

exports.defineModels = defineModels;

No errors are thrown, and the mongo logs indicate that 5 new connections are spun up when I launch my app. No new logs appear (except [clientcursormon] logs). The app prints out the following when I load /dbTest in Chrome:

Here goes...

  Test Track:
    { name: 'TestTrack',
      artist: 'Basik',
      _id: 5031606aa11cf95815000001,
      next: [ 'track1', 'track2' ],
      tags: [ 'test' ] }

Mongo appears to be configured correctly. When I have node run the simple "Getting Started" script that Mongoose walks you through, everything works correctly.

Can anyone point out what I'm doing incorrectly?

• javascript
• node.js
• mongodb
• express
• mongoose

2 Answers 2

You haven't created a connection for Mongoose to use by default. Replace this:

db = mongoose.createConnection('localhost','nextrak')

With this:

db = mongoose.connect('localhost', 'nextrak');

Couple other nits:

1. You're setting Track as a global variable in models.js
2. You need to add a err parameter to your t.save callback.

First of all, if you only need one connection, you should use mongoose.connect().

Second, I think you're mixing up the track schema and track model. These are two separate things. new Schema() create a Schema object, which gets passed to mongoose.model(). The result of mongoose.model (which it seems you're discarding) is what you want to use when creating a new instance to store in the database, not the schema.