New Twiddle

controllers.application.js

import Ember from 'ember';

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

controllers.foo.js

import Ember from 'ember';

const FOOS = [
  Ember.Object.create({ id: 1 }),
  Ember.Object.create({ id: 2 }),
  Ember.Object.create({ id: 3 })
];

export default Ember.Controller.extend({
  queryParams: ["qp"],
  qp: "",
  foos: FOOS
});

router.js

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

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

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

export default Router;

routes.foo.js

import Ember from 'ember';

export default Ember.Route.extend({
  /*queryParams: {
    qp: { refreshModel: true}
  },*/ 
  
  model({ foo_id }) {
    
  }
});

styles.app.css

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

.active {
  font-weight: bold;
}

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<div>
{{outlet}}
</div>

{{#link-to "foo" 1}}Foo{{/link-to}}
<br>
<br>

templates.foo.hbs

Foos:

<hr>

{{#each foos as |foo|}}
  <p>
    {{#link-to "foo" foo}}
      Link to {{foo.id}}, no QP
    {{/link-to}}
  </p>
{{/each}}

<hr>

{{#each foos as |foo|}}
  <p>
    {{#link-to "foo" foo (query-params qp="baz")}}
      Link to {{foo.id}}, with new QP
    {{/link-to}}
  </p>
{{/each}}

<hr>

{{#each foos as |foo|}}
  <p>
    {{#link-to "foo" foo.id}}
      Link to {{foo.id}} with ID, no QP
    {{/link-to}}
  </p>
{{/each}}

<hr>

{{#each foos as |foo|}}
  <p>
    {{#link-to "foo" foo.id (query-params qp="baz")}}
      Link to {{foo.id}} with ID, with new QP
    {{/link-to}}
  </p>
{{/each}}

<hr>

{{#each foos as |foo|}}
  <p>
    {{#link-to "foo" foo (query-params qp="")}}
      Link to {{foo.id}}, with default QP
    {{/link-to}}
  </p>
{{/each}}

<hr>

<p>
{{#link-to "foo" (query-params qp="bar")}}
  Link to self with QP change
{{/link-to}}
</p>

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"
  }
}