title: Nodejs / Express - Launching my app: express.createServer() is deprecated
body: <p>I downloaded a node app to test and play around with. I have googled around and found that Express is found to be a little outdated. Can someone help me to fix the implemented code?</p>
  
  <p>Here is the code</p>
  
  <pre><code>/**
   * Module dependencies.
   */
  
  // base dependencies for app
  var express = require('express')
    , routes = require('./routes')
    , DB = require('./accessDB').AccessDB
    , passport = require('passport')
    , mongoose = require('mongoose')
    , mongoStore = require('connect-mongodb');
  
  var app = module.exports = express.createServer();
  global.app = app;
  
  var DB = require('./accessDB');
  var conn = 'mongodb://localhost/CrowdNotes';
  var db;
  
  // SocketIO Configuration
  //var io = require('socket.io').listen(app);
  //
  //io.sockets.on('connection', function(socket) {
  //  socket.on('user note', function (note) {
  //    console.log(note);
  //  });
  //});
  
  // Configuration
  app.configure(function(){
    app.set('views', __dirname + '/views');
    app.set('view engine', 'jade');
    app.use(express.cookieParser());
    app.use(express.bodyParser());
    app.use(express.methodOverride());
    app.use(require('stylus').middleware({ src: __dirname + '/public' }));
    app.use(express.session({ 
      store: mongoStore(conn)
    , secret: 'applecake'
    }, function() {
      app.use(app.router);
    }));
    app.use(passport.initialize());
    app.use(passport.session());
    app.use(express.static(__dirname + '/public'));
  });
  
  db = new DB.startup(conn);
  
  app.configure('development', function(){
    app.use(express.errorHandler({ dumpExceptions: true, showStack: true })); 
  });
  
  app.configure('production', function(){
    app.use(express.errorHandler()); 
  });
  
  // Routes
  require('./routes')(app);
  
  app.listen(3000);
  console.log("Express server listening on port %d in %s mode", app.address().port, app.settings.env);
  </code></pre>
  
  <p>And here is the error I receive once running the app via <code>node app</code></p>
  
  <pre><code>C:\CrowdNotes&gt;node app
  Warning: express.createServer() is deprecated, express
  applications no longer inherit from http.Server,
  please use:
  
    var express = require("express");
    var app = express();
  
  
  C:\CrowdNotes\app.js:63
  console.log("Express server listening on port %d in %s mode", app.address().po
                                                                    ^
  TypeError: Object function app(req, res){ app.handle(req, res); } has no method
  'address'
      at Object.&lt;anonymous&gt; (C:\CrowdNotes\app.js:63:67)
      at Module._compile (module.js:449:26)
      at Object.Module._extensions..js (module.js:467:10)
      at Module.load (module.js:356:32)
      at Function.Module._load (module.js:312:12)
      at Module.runMain (module.js:492:10)
      at process.startup.processNextTick.process._tickCallback (node.js:244:9)
  
  C:\CrowdNotes&gt;
  </code></pre>
  
  <p>FIXED.</p>
  
  <p>I am now at the point where I register, and go to login using my new 'User' data and receive this error:</p>
  
  <pre><code>ReferenceError: C:\CrowdNotes\views\account.jade:6
      4|   div#header 
      5|     h2 CrowdNotes
    &gt; 6|     p Hi, #{currentUser.name.first}! 
      7| 
      8|   - if (myEvent)
      9|     p.center My Event: #{myEvent.name} 
  
  currentUser is not defined
      at eval (eval at &lt;anonymous&gt; (C:\CrowdNotes\node_modules\jade\lib\jade.js:176:8))
      at exports.compile (C:\CrowdNotes\node_modules\jade\lib\jade.js:181:12)
      at Object.exports.render (C:\CrowdNotes\node_modules\jade\lib\jade.js:216:14)
      at View.exports.renderFile [as engine] (C:\CrowdNotes\node_modules\jade\lib\jade.js:243:13)
      at View.render (C:\CrowdNotes\node_modules\express\lib\view.js:75:8)
      at Function.app.render (C:\CrowdNotes\node_modules\express\lib\application.js:500:10)
      at ServerResponse.res.render (C:\CrowdNotes\node_modules\express\lib\response.js:716:7)
      at module.exports.getAccount (C:\CrowdNotes\routes\index.js:47:11)
      at Promise.module.exports.getMyEvent (C:\CrowdNotes\accessDB.js:54:7)
      at Promise.addBack (C:\CrowdNotes\node_modules\mongoose\lib\promise.js:128:8)
  </code></pre>
  
  <p>I'm wondering if this is some form of syntax error too? Not sure what's gone wrong here as I thought the code all lined up tbh.</p>
  
  <p>I am using the code from here: <a href="https://github.com/rockbot/crowdnotes">https://github.com/rockbot/crowdnotes</a></p>