New Twiddle

models.dummy.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(),
  hashData: attr()
});

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('dummy');
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model: function() {
 		this.store.push({
			"data": {
    		"type": "dummy",
        "id": "1",
        "attributes": {
          "name": "JSON API paints my bikeshed!",
          "hashData": {
            g: 1,
            h: 2
          }
        }
  		}
    });
    
    return this.store.peekRecord('dummy', 1);
  },
  
  actions: {
    cancel(model) {
      model.rollbackAttributes();
    },
    
    changeManually(model) {
      model.set('hashData', {g: 2, h: 4});
    }
  }
});

templates.application.hbs

Dummy Route<br />

Name:: {{input type="text" value=model.name}}<br />

G: {{input type="text" value=model.hashData.g}}<br />

H: {{input type="text" value=model.hashData.h}}<br />

Model is dirty: {{model.hasDirtyAttributes}}<br />

<button {{action 'cancel' model}}>Rollback</button>

<button {{action 'changeManually' model}}>Change manually</button>

twiddle.json

{
  "version": "0.10.7",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.0",
    "ember-data": "2.10.0",
    "ember-template-compiler": "2.10.0",
    "ember-testing": "2.10.0"
  },
  "addons": {}
}