recheck json api

controllers.application.js

import Ember from 'ember';

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

models.comment.js

import DS from 'ember-data';

export default DS.Model.extend({
  post: DS.belongsTo('post'),
  message: DS.attr('string'),
  user: DS.belongsTo('user'),

  ready() {
    console.log("before", this.get('id'), this.toJSON());
    let names = Ember.get(this.constructor, 'relationshipsByName')._keys.list;
    let relationships = this.getProperties.apply(this, names);
    Ember.RSVP.hash(relationships).then(()=>{
      console.log("after", this.get('id'), this.toJSON());
    });
  },
});

models.post.js

import DS from 'ember-data';

export default DS.Model.extend({
  title: DS.attr('string'),
  comments: DS.hasMany('comment'),
});

models.user.js

import DS from 'ember-data';

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

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  init() {
    this._super(...arguments);

    $.mockjax({
      url: '/posts/1',
      responseText: {
        data: {
          type: "post",
          id: 1,
          attributes: {
            title: "lorem ipsum",
          },
          relationships: {
            comments: {
              links: {
                related: "/posts/1/comments"
              }
            }
          },
        },
      }
    });
            
    $.mockjax({
      url: '/posts/1/comments',
      responseText: {
        data: [{
          type: "comment",
          id: 1,
          attributes: {
            message: "my favorite!",
          },
          relationships: {
            user: {
              data: { type: "users", id: 1 },
            },
          }
        }]
      }
    });

    $.mockjax({
      url: '/users/1',
      responseText: {
        data: {
          type: "user",
          id: 1,
          attributes: {
            name: "bill",
          },
        },
      },
    });
  },
  
  model() {
    return this.store.findRecord('post', 1);
  },
});

templates.application.hbs

<b>{{model.title}}</b>
<ul>
  {{#each model.comments as |comment|}}
    <li>
      {{comment.message}}
      (by: {{comment.user.name}})
    </li>
  {{/each}}
</ul>

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "release",
    "ember-data": "release",
    "ember-template-compiler": "release",
    "jquery-mockjax": "https://cdnjs.cloudflare.com/ajax/libs/jquery-mockjax/1.6.2/jquery.mockjax.js"
  }
}