mongoose relationships

create.js

var mongoose = require('mongoose');
mongoose.connect('localhost/test');


var Schema   = mongoose.Schema;

var AlbumSchema = new Schema({
  artist: { type: Schema.Types.ObjectId, ref: 'Artist' },
  name: String,
  year: Number,
  tracks: [String]
});

var ArtistSchema = new Schema({
  name: String
});

var Artist = mongoose.model('Artist', ArtistSchema );
var Album = mongoose.model('Album', AlbumSchema );

var pink_floyd = new Artist({name: 'Pink Floyd'});

var darkside = new Album({
  name: 'Dark Side Of The Moon',
  year: 1973,
  tracks: ['Speak To Me', 'Breathe In The Air'],
  artist: pink_floyd
});

pink_floyd.save();
darkside.save();

mongoose.disconnect();