QueryParam object

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  queryParams:['filter'],
  filter:'',
  actions:{
    changeFilter(){
      console.log('changeFilter');     
      Ember.set(this.get('filter'),"filter2","Anderson");
      this.set('filter',filter);
    }
  }
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  queryParams:{ filter:{ refreshModel:true}}
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{filter}} {{log filter}}
<br>
<button {{action 'changeFilter'}}> Change</button>
{{outlet}}
<br>
<br>

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"
  }
}