nested-query-params

controllers.application.js

import Ember from 'ember';

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

controllers.parent.child.js

import Ember from 'ember';

export default Ember.Controller.extend({
    queryParams: [
        { field: { type: 'array', as: 'child-field' } },
    		{ page: { type: 'string', as: 'child-page' } },
  	],
     
		field: ['bar'],
    page: '2',
 
});

controllers.parent.js

import Ember from 'ember';

export default Ember.Controller.extend({
    queryParams: [
        { field: { type: 'array', as: 'parent-field' } },
    		{ page: { type: 'string', as: 'parent-page' } },
  	],
     
		field: ['foo'],
    page: '1',
 
});

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('parent', {}, function() {
    this.route('child')
  })
});

export default Router;

routes.parent.child.js

import Ember from 'ember';

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

routes.parent.js

import Ember from 'ember';

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

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>
<hr>
<br>
{{#link-to 'parent' (query-params parent-page=5) }}Visit Parent route{{/link-to}} | {{#link-to 'parent.child' }}Visit Child route{{/link-to}}
{{outlet}}
<br>
<br>

templates.parent.child.hbs

<h5>Child route</h5>

Child field: {{field}} <br>
Child page: {{page}}

templates.parent.hbs

<h3>Parent Route</h3>
Parent field: {{field}} <br>
Parent page: {{page}}
<hr>

{{outlet}}

twiddle.json

{
  "version": "0.13.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.16.2",
    "ember-template-compiler": "2.16.2",
    "ember-testing": "2.16.2"
  },
  "addons": {
    "ember-data": "2.16.3"
  }
}