How to use waterline for MongoDB.

waterline_mongo.js

var express = require('express');
var app = express();
var Waterline = require('waterline');
var sailsMongoAdapter = require('sails-mongo');
var orm = new Waterline();
var bodyParser = require('body-parser');
var bcrypt = require('bcrypt');

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json())

var userCollection = Waterline.Collection.extend({
	identity: 'user',
	connection: 'default',
	migrate: 'safe',
	autoCreatedAt: false,
	autoUpdatedAt: false,
	attributes: {
		firstname: {type: 'string', required: true},
		lastname:  {type: 'string', required: true},
		sex:       {type: 'string', enum: ['male', 'female']},
		password:  {type: 'string', minLength: 6, required: true},
		fullname:  function(){ return this.firstname + ' ' + this.lastname; },
		toJSON:    function(){ var obj = this.toObject(); delete obj.password; return obj; },
    // Add a reference to Pets
    pets: {
    	collection: 'pet',
    	via: 'owner'
    }
},

beforeCreate: function(values, next){
	bcrypt.hash(values.password, 10, function(err, hash) {
		if (err) {
			return next(err);
		}
		values.password = hash;
		next();
	});
}
});

var petCollection = Waterline.Collection.extend({
	identity: 'pet',
	connection: 'default',
	autoCreatedAt: false,
	autoUpdatedAt: false,
	attributes: {
		breed: 'string',
		type: 'string',
		name: 'string',
    // Add a reference to User
    owner: {
    	model: 'user'
    }
}
});
orm.loadCollection(userCollection);
orm.loadCollection(petCollection);

var config = {
	adapters: {
		'default': 'mongo',
		'mongo': require('sails-mongo')
	},

	connections: {
		default: {
			adapter: 'mongo',
			url: "mongodb://localhost:27017/test"
		}
	}
};
orm.initialize(config, function(err, data) {
	if (err) {
		throw err;
	}
	app.models = data.collections;
	app.connections = data.connections;

// Tease out fully initialised models.
var User = data.collections.user;
var Pet  = data.collections.pet;
});


app.post('/user', function(req, res){
	app.models.user.create(req.body, function(err, model){
		if(err) return res.json({err: err}, 500);
		console.log("full name: " + model.fullname());
		return res.json(model);
	});
});
app.get('/user',function(req, res){
	app.models.user.find()
	.populate('pets')
	.exec(function(err, users){
		if(err) return res.json({err: err}, 500);
		return res.json(users);
	});
});
var server = app.listen(9000, function () {
	var host = server.address().address;
	var port = server.address().port;
	console.log('App listening at http://%s:%s', host, port);
});