ember-data#4918 / UnloadRecord State

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  store: Ember.inject.service('store'),
  
  errorMsgs: null,
  
  init() {
    this._super(...arguments);
    
    let store = this.get('store');     
    store.push({ 
      data: [{
       "type": "post",
       "id": "1",
       "attributes": {
         "name": "JSON API paints my bikeshed!"
        }
      }]
    });
    this.set('post', store.peekRecord('post', 1));
    this.set('errorMsgs', []);
    
    Ember.onerror = (error) => {
      this.get('errorMsgs').pushObject(error.message);
    };
  },
  
  actions: {
    dirty() { 
      this.get('post').set('name', 'dirty');
    },
    rollback() {
      this.get('post').rollbackAttributes();
    },
    unload() {
      this.get('post').unloadRecord();
    }
  }
});

models.post.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')
});

styles.app.css

body {
  margin: 12px 16px;
  font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 12pt;
}

.error-container {
  color: #a94442;
  background-color: #f2dede;
  border-color: #ebccd1; 
  padding: 6px;
}

.error-container .message {
  margin: 8px 0;
  display: block;
  font-size: 13px;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
State: {{post.currentState.stateName}}

<br><br>

<button {{action "dirty"}}>Dirty Record</button>
<button {{action "rollback"}}>Rollback Record</button>
<button {{action "unload"}}>Unload Record</button>

<br><br><br>

{{#if errorMsgs}}
  <div class="error-container">
    {{#each errorMsgs as |msg|}}
      <span class="message">{{msg}}</span>
    {{/each}}
  </div>
{{/if}}

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": "2.13.1"
  }
}