Query Record Relationships Error

adapters.application.js

import DS from 'ember-data';

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

models.myset-revision.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Model.extend({
  myset: belongsTo('myset'),
  createdDate: attr('date'),
  settings: attr()
});

models.myset.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Model.extend({
  name: attr('string'),
  revisionLatest: belongsTo('myset-revision')
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('set-edit', { path: '/edit/:set_id/:revision_id' });
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  init(){
  	this._super(...arguments);
    $.mockjax({
      url: '/mysets',
      responseText: [
        {
          id: "1",
          name: "Test 1",
          revisionLatest: "2"
        }
      ]
    });
    $.mockjax({
      url: '/mysets/1',
      responseText: {
      	id: "1",
        name: "Test 1",
        revisionLatest: "2"
      }
    });
    $.mockjax({
      url: '/mysetRevisions/2',
      responseText: {
        id: "2",
        myset: "1",
        createdDate: "2016-06-27T16:11:43.4970000Z"
      }
    });
    $.mockjax({
      url: '/mysetRevisions',
      data: {
        includeSettings: true,
        revision: 2
      },
      responseText: {
      	id: "2",
        myset: "1",
        createdDate: "2016-06-27T16:11:43.4970000Z",
        settings: {
        	setting1: "value"
        }
      }
    });
     $.mockjax({
      url: '/mysetRevisions',
      data: {
        includeSettings: true,
        revision: 1
      },
      responseText: {
      	id: "1",
        myset: "1",
        createdDate: "2016-06-27T16:11:43.4970000Z",
        settings: {
        	setting1: "value1"
        }
      }
    });
    $.mockjax({
      url: '/mysetRevisions',
      data: {
        setId: 1
      },
      responseText: [
        { id: "1", myset: "1", createdDate: "2016-06-27T15:11:43.4970000Z" },
        { id: "2", myset: "1", createdDate: "2016-06-27T16:11:43.4970000Z" }
      ]
    });
  },
  model(){
  	return this.store.findAll('myset')
  }
});

routes.set-edit.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(params){
  	return Ember.RSVP.hash({
      set: this.store.findRecord('myset', params.set_id),
      revision: this.store.queryRecord('myset-revision', {
         revision: params.revision_id,
         includeSettings: true
      }),
      revisions: this.store.query('myset-revision', { setId: params.set_id })
    });
  }
});

serializers.application.js

import DS from 'ember-data';

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

templates.application.hbs

<h1>ember data bug</h1>

<h3>Set #1 revisions</h3>
{{#link-to 'set-edit' 1 1}}Revision 1{{/link-to}}
{{#link-to 'set-edit' 1 2}}Revision 2{{/link-to}}
<div>
{{outlet}}
</div>

templates.set-edit.hbs

<h3>Editing Set: {{model.set.name}}; Revision: {{model.revision.id}}</h3>
<div>ModelRevisionCreated: {{model.revision.createdDate}}</div>
<div>SetLatestRevision: {{model.set.revisionLatest.id}}</div>
<div>Editing Revision ID: {{model.revision.id}}</div>

<h3> Historical revisions </h3>
{{#each model.revisions as |revision|}}
	<div>{{#link-to 'set-edit' revision.myset.id revision.id}}View Revision: {{revision.id}}{{/link-to}}</div>
{{/each}}

twiddle.json

{
  "version": "0.10.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.6.0",
    "ember-data": "2.6.1",
    "ember-template-compiler": "2.6.0",
    "jquery-mockjax": "https://cdnjs.cloudflare.com/ajax/libs/jquery-mockjax/1.6.2/jquery.mockjax.js"
  },
  "addons": {}
}