app.js

var http = require("http");
var db = require("./config/db");
var Controller = require("./controller.js");
 
http.createServer(function(request, response) {
  response.writeHead(200, {"Content-Type": "text/plain; charset=utf-8"});
 
 	var url = request.url;

 	switch(url) {

 		case '/beers':
 			Controller.retrieve(request, response);
 		break;

 		case '/beers/create':
 			Controller.create(request, response);
		break;

 		case '/beers/update':
 			Controller.update(request, response);
		break;

 		case '/beers/delete':
 			Controller.delete(request, response);
		break;

		default:
			response.end('Rota não encontrada.');

 	}
 
}).listen(3000);
console.log('Server running at http://localhost:3000/');

controller.js

var Beer = require('./model.js');

var Controller = {
	create: function(req, res){
		var dados = {
	    name: 'Skol',
	    description: 'Mijo de rato',
	    alcohol: 4.5,
	    price: 3.0,
	    category: 'pilsen'
	  };
	 
		var model = new Beer(dados);
	 
	  model.save(function (err, data) {
	    if (err){
	      console.log('Erro: ', err);
	      res.end('Erro: ' + err);
	    }
	    else{
	      console.log('Cerveja Inserida: ', data);
	      res.end('Cerveja Inserida: ' + JSON.stringify(data));
	    }
	  });
	},

	retrieve: function(req, res){
		var query = {};
		Beer.find(query, function (err, data) {
	    if (err){
	      res.end('Erro: ' + err);
	    }
	    else{
	      res.end('Cervejas Listadas: ' + JSON.stringify(data));
	    }
	  });
	},

	update: function(req, res){
	 	var query = {name: /skol/i}
			, mod = {alcohol: 666};

		Beer.update(query, mod, function (err, data) {
		  if (err){
		    res.end('Erro: ' + err);
		  }else{
		    res.end('Cerveja atualizada com sucesso' + JSON.stringify(data));
		  }
		});
	},

	delete: function(req, res){
		var query = {name: /skol/i}
			,	mod = {alcohol: 666};

		Beer.remove(query, function (err, data) {
		  if (err){
		    res.end('Erro: ' + err);
		  }
		  else{
		    res.end('Cerveja deletada com sucesso' + JSON.stringify(data));
		  }
		});
	}

};

module.exports = Controller;

db.js

var mongoose = require('mongoose');
mongoose.connect('mongodb://localhost/workshop-online-marco-2015');

var db = mongoose.connection;
db.on('error', function(err){
    console.log('Erro de conexao.', err)
});
db.on('open', function () {
  console.log('Conexão aberta.')
});
db.on('connected', function(err){
    console.log('Conectado')
});
db.on('disconnected', function(err){
    console.log('Desconectado')
});

module.exports = db

model.js

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var BeerSchema = new Schema({ name: { type: String, default: '' }
  , description: { type: String, default: '' }
  , alcohol: { type: Number, min: 0, default: '' }
  , price: { type: Number, min: 0, default: '' }
  , category: { type: String, default: ''}
  , created_at: { type: Date, default: Date.now }
  });

module.exports = mongoose.model('Beer', BeerSchema);