EmberFire

adapters.application.js

import DS from 'ember-data';

export default DS.FirebaseAdapter.extend({
  firebase: new Firebase('https://chchjs.firebaseio.com')
});

controllers.application.js

import Ember from 'ember';

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

models.author.js

import DS from 'ember-data';

export default DS.Model.extend({
  name: DS.attr('string'),
  
  books: DS.hasMany('book')
});

models.book.js

import DS from 'ember-data';

export default DS.Model.extend({ 
  title: DS.attr('string'),
  
  author: DS.belongsTo('author')
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  
  model() {    
    return Ember.RSVP.hash({
      books: this.store.findAll('book'),
      authors: this.store.findAll('author')
    });
  },
  
  setupController(controller, model) {
    controller.setProperties(model);
    this._super(controller, model.books);
  }
});

templates.application.hbs

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

{{#each model as |book|}}
{{book.title}}
{{/each}}
<br>
<br>

twiddle.json

{
  "version": "0.7.2",
  "contentSecurityPolicy": {'connect-src': "'self' https://auth.firebase.com wss://*.firebaseio.com"},  
  "EmberENV": {          
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.4.4/ember-template-compiler.js",
  	"firebase": "https://cdn.firebase.com/js/client/2.4.2/firebase.js",
		"emberfire": "https://cdn.firebase.com/libs/emberfire/1.6.6/emberfire.min.js"
  }
}