New Twiddle

controllers.application.js

import Ember from 'ember';
import QueryParams from 'ember-parachute';

export const myQueryParams = new QueryParams({
  'qps.housingType': {
    as: 'type',
    defaultValue: 'single',
  },
  'qps.housing.developmentType': {
    as: 'housing.developmentType',
    defaultValue: 'multi',	
	}
});

const { service } = Ember.inject;

export default Ember.Controller.extend(myQueryParams.Mixin, {
  qps: service()
});

controllers.index.js

import Ember from 'ember';

const { service } = Ember.inject;

export default Ember.Controller.extend({
  qps: service(),
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
});

services.qps.js

import Ember from 'ember';

export default Ember.Service.extend({
  housingType: 'multi',
  housing: {
  	developmentType: ''
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{<br/>
	&nbsp; type: {{qps.housingType}}<br/>
}<br/>
<br/>


Type: {{input type='text' value=qps.housingType}}<br/>
{{outlet}}
<br>
<br>

templates.index.hbs

Type in descending route: {{input type='text' value=qps.housingType}}<br/>

Type in nested params: {{input type='text' value=qps.housing.developmentType}}<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",
    "ember-parachute": "0.3.2"
  }
}