Current Route

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle'
});

application.template.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{link-to 'books' 'books'}}
<p>{{outlet}}</p>
<br>
<br>

router.js

import Ember from 'ember';
import config from './config/environment';

var Router = Ember.Router.extend({
  location: config.locationType
});

Router.map(function() {
  this.route('books', { path: '/books' }, function() {});
});

export default Router;

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  _routing: Ember.inject.service('-routing'),
  currentRouteName: Ember.computed.reads('_routing.currentRouteName'),
  // currentRouteName will be undefined if we get an error at the application route level
  // not the most ideal API, but let's go with what we have
  // returns true if currentRouteName is undefined or null
  isFirstRoute: Ember.computed.none('currentRouteName'),
  model: function(params) {
    throw new DS.InvalidError([
      {
        source: { pointer: 'data/attributes/title' },
        detail: 'cannot be blank'
      }
    ]);
  },
  actions: {
    error: function(error, transition) {
      debugger
      if ( this.get('isFirstRoute') ) {
        this.transitionTo('index');
      } else{
        return true;
      }
    }
 }
});

routes.books.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    throw new DS.InvalidError([
      {
        source: { pointer: 'data/attributes/first_name' },
        detail: 'is invalid'
      }
    ]);
  }
});

templates.books.hbs

List of books here

twiddle.json

{
  "version": "0.4.13",
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/1.13.13/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/1.13.10/ember-template-compiler.js"
  }
}