query-params-no-loading

components.my-button.js

import Ember from 'ember';

export default Ember.Component.extend({
  click() {
    this.sendAction('changeParam');
  }
});

controllers.application.js

import Ember from 'ember';

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

controllers.main-route.js

import Ember from 'ember';

export default Ember.Controller.extend({
  queryParams: ['one', 'two']
});

router.js

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

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

Router.map(function() {
  this.route('main-route', { path: ':parent' }, function() {
    this.route('sub-route');
  });
});

export default Router;

routes.main-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  actions: {
    changeParam1() {
      this.transitionTo({ queryParams: { one: 'one' }});
    },
    changeParam2() {
      this.transitionTo({ queryParams: { two: 'two' }});
    }
  }
});

routes.main-route.sub-route.js

import Ember from 'ember';

export default Ember.Route.extend({
  model: function(params, transition){

    return new Ember.RSVP.Promise(function(resolve){
        setTimeout(function(){ 
            resolve();
        }, 1000); // 1 second delay, wooh, your server is slow!!!
    });
 }
});

templates.application.hbs

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

templates.components.my-button.hbs

<button>{{text}}</button>

templates.main-route.hbs

<p>Click the first button to set param one</p>
{{my-button text="param1" changeParam="changeParam1"}}
<p>Click the second button to set param two</p>
{{my-button text="param2" changeParam="changeParam2"}}

<p>When there is a dynamic segment in the parent route, but no loading template both params work.</p>
{{outlet}}

templates.main-route.sub-route.hbs

<p>Sub route</p>

twiddle.json

{
  "version": "0.7.2",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "canary",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.4.3/ember-data.js",
    "ember-template-compiler": "canary"
  }
}