New Twiddle

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  queryParams: ['foo', 'bar'],
  foo: null,
  bar: null,
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  beforeModel(transition) {
    if (!transition.queryParams.foo && !transition.queryParams.bar) {
      transition.abort();
      this.transitionTo('application', {
        queryParams: {
          bar: 'baz',
          foo: 'fiz',
        },
      });
    }
  },
  model(params) {
    return {
      params: JSON.stringify(params),
    };
  },
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<p>controller->foo: {{foo}}</p>
<p>controller->bar: {{bar}}</p>
<p>route->model->params: {{model.params}}</p>

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}