validated-form with rollback

controllers.application.js

import Ember from 'ember';
import { task, timeout } from 'ember-concurrency';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  model: {},
  
	submit: task(function * (model) {
    console.log('saving...', model);
    yield timeout(1000);
    console.log('done!');
  }),
  
  actions: {
    cancel(model) {
      console.log('cancel', model);
      model.rollback();
    }
  }
});

templates.application.hbs

{{#validated-form
  model     = (changeset model)
  on-submit = submit
  as |f|}}
  {{f.input label="First name" name='firstName'}}
  {{f.submit label="Save"}}
  <button {{action 'cancel' f.model}}>Cancel</button>
{{/validated-form}}

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1",
    "ember-concurrency": "0.8.7",
    "ember-validated-form": "0.4.1"
  }
}