Use middleware

[jollen]

FIXME

var mongoose = require('mongoose');
mongoose.connect('mongodb://test:123456@ds151242.mlab.com:51242/vcard');

var db = mongoose.connection;
db.once('open', function callback () {
  console.log('MongoDB: connected.'); 
});

FIXED

app.use(function(req, res, next) {
  mongoose.connect('mongodb://test:123456@ds151242.mlab.com:51242/vcard');
  var db = mongoose.connection;
  db.once('open', function callback () {
    console.log('MongoDB: connected.'); 
    next();
  });  
});