New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

routes.application.js

import Ember from 'ember';

let Song = Ember.Object.extend({
  title: ''
});

let Band = Ember.Object.extend({
  name: '',
  songs: [],
});

let pj = Band.create({ name: 'Pearl Jam' });
let lz = Band.create({ name: 'Led Zeppelin' });

let blackDog = Song.create({ title: 'Black Dog' });

lz.get('songs').pushObject(blackDog);
console.log(pj.get('songs.firstObject.title'));

let BetterBand = Ember.Object.extend({
  name: '',
  init() {
    this._super(...arguments);
    this.set('songs', []);
  }
});

let betterPj = BetterBand.create({ name: 'Pearl Jam' });
let betterLz = BetterBand.create({ name: 'Led Zeppelin' });

betterLz.get('songs').pushObject(blackDog);
console.log(betterPj.get('songs.firstObject.title'));

export default Ember.Route.extend({
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {}
}