promises 5

routes.index.js

import Ember from 'ember';

let ready = false;

export default Ember.Route.extend({
  readyHandler: Ember.inject.service(),

  model() {
    return new Ember.RSVP.Promise((resolve) => {
      setTimeout(resolve, 2000);
    }).then(() => {
      return this.get('readyHandler.isReady');
    });
  },

  afterModel(ready) {
    if (!ready) {
      throw new Error('not ready');
    }
  }
});

routes.loading.js

import Ember from 'ember';

export default Ember.Route.extend({
  readyHandler: Ember.inject.service(),

  actions: {
    becomeReady() {
      console.log('loading becomeReady');
      this.get('readyHandler').set('isReady', true);
    }
  }
});

services.ready-handler.js

import Ember from 'ember';

export default Ember.Service.extend({
  isReady: false
});

templates.application.hbs

<p>(Tricky) Edit <em>only</em> hbs file(s) so that the index route can be successfully entered.</p>

<p>
  <button {{action (action (mut hint1) true)}}>Hint 1</button>
  {{#if hint1}}
    Look at both route files.
  {{/if}}
</p>
<p>
  <button {{action (action (mut hint2) true)}}>Hint 2</button>
  {{#if hint2}}
    Even after editing, you will still need to interact with the page while it is loading in order to make it to the index route.
  {{/if}}
</p>

<br>
{{outlet}}

templates.error.hbs

<h2>fail {{model}}</h2>

templates.index.hbs

index {{model}}

templates.loading.hbs

<h2>loading</h2>

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"
  }
}