Model Change

controllers.application.js

import Ember from 'ember';

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

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
  newProperty: undefined,
  
  actions: {
		changeProperty: function() {
			this.send('changeModel', this.get('newProperty'));
		}
	}
  
});

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
  	return Ember.Object.create({
    	test: 'test' 
      
    })
  },
  
  actions: {
  	changeModel: function(newValue) {
      debugger;
    	this.modelFor('index').set('test', newValue);
    }
  }
});

templates.application.hbs

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

templates.index.hbs

<h2>Index</h2>


{{input value=newProperty}}


<button {{action 'changeProperty'}}>Change Model</button>
<h4>{{model.test}}</h4>

twiddle.json

{
  "version": "0.10.4",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.7.0",
    "ember-data": "2.7.0",
    "ember-template-compiler": "2.7.0"
  },
  "addons": {}
}