Fixture file not found in Ember project

Is there a basic tutorial or guide on using Ember fixtures? I have gone through the tilde training but it drops right in the middle of a project and I am trying to start from Ember new following the same conventions taught in the course.

I have set up the following routes and fixture:

// routes/application.js
  import Ember from 'ember';
  import speakers from 'models/speaker-fixtures';

  export default Ember.Route.extend({
    model: function() {
       return speakers;
  });

// fixture app/model/speaker-fixtures.js
export default [{
  id: "1",
  twitterHandle: "foogirl",
  name: "foo girl",
  avatar: ""
}, {
  id: "2",
  twitterHandle: "fooboy",
  name: "foo boy",
  avatar: ""
}];

// adapter/application.js 
import DS from 'ember-data';

export default DS.FixtureAdapter.extend({});

// serializer/application.js
import DS from "ember-data";

export default DS.RESTSerializer.extend({});

<.code>

error received : File: project-voice/routes/application.js ENOENT, no such file or directory '/Users/../tmp/tree_merger-tmp_dest_dir-http://ift.tt/1COuNUf'

Is there something I am missing that will help ember find my fixture file? This is my first attempt in creating an app outside a tutorial and I am a bit lost. *I also tried setting up the fixture in the model how it explains in the embercli doc and could not get that work.

Any push in the right direction would help tremendously. Thanks