rollback

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember!',
  
  actions: {
    more() {
      this.get('model').set('name', 'danston');
      this.get('model.myList').push('d');
    },
    
    reset() {
      this.get('model').rollbackAttributes();
    }
  }
});

models.my-model.js

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

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

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
  	return this.get('store').createRecord('myModel', {
  		myList: ['a', 'b', 'c'],
      name: 'jmac',
		});
	}
});

templates.application.hbs

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

{{model.name}}

<ul>
	{{#each model.myList as |i|}}
  	<li>{{i}}</li>
  {{/each}}
</ul>

<button {{action "more"}}>More</button>
<button {{action "reset"}}>Reset</button>

twiddle.json

{
  "version": "0.14.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "2.18.2",
    "ember-testing": "2.18.2"
  },
  "addons": {
    "ember-data": "2.18.2"
  }
}