Ember Model : Person/Computers

PersonComputerModel.js

var attr = Ember.attr, hasMany = Ember.hasMany, belongsTo = Ember.belongsTo;
var apiPrefix = '/api';

App.CustomAdapter = Ember.RESTAdapter.extend({
  generateIdForRecord: function(record) {
    var ch = "abcdefghiklmnopqrstuvwxyz"[Math.floor(25 * Math.random())];
    return ch+'xxxyxxx'.replace(/[xy]/g, function(c) {
      var r, v;
      r = Math.random() * 16 | 0;
      v = c === 'x' ? r : r & 0x3 | 0x8;
      return v.toString(16);
    });
  },
  createRecord: function(record) {
    console.log('custom : create');
    record.set('id', this.generateIdForRecord());
    return this._super(record);
  },
  buildURL: function() {
    return this._super.apply(this, arguments).replace(/\.json$/, '');
  }
});

App.Person = Ember.Model.extend({
  id: attr(),
  name: attr(),
  computers: hasMany('App.Computer', {key: 'computers', embedded: true})  
});
App.Person.url = apiPrefix + "/persons";
App.Person.rootKey = "";
App.Person.adapter = App.CustomAdapter.create();

App.Computer = Ember.Model.extend({
  id: attr(),
  name: attr(),
  vendor: attr(),
  person: belongsTo('App.Person', {key: 'person_id'})  
});
App.Computer.url = apiPrefix + "/computers";
App.Computer.adapter = App.CustomAdapter.create();

/*
var newPerson = App.Person.create({"name":"name03"});
newPerson.save()
var comp = newPerson.get('computers')
comp.create({"name":"comp01", "vendor":"Apple", "person" : newPerson.get("id") });
comp.save()
*/