stackoverflow question#43350608

components.my-component.js

import Ember from 'ember';

export default Ember.Component.extend({
  actions: {
    onButtonClick() {
      this.get('updateFoo')();
    }
  }
});

controllers.application.js

import Ember from 'ember';

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

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return Ember.RSVP.hash({
      foo: 'foo',
      boo: 'boo'
    });
  },
  
  actions: {
    updateFoo() {
      Ember.set(this.controllerFor(this.get('routeName')).get('model'), 'foo', 'foo updated');
    }
  }
});

templates.application.hbs

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

templates.components.my-component.hbs

{{foo}}-{{boo}}
<br><br>
<button onclick={{action 'onButtonClick'}}>Update foo within route</button>

templates.index.hbs

{{my-component updateFoo=(route-action 'updateFoo') foo=model.foo boo=model.boo}}

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-route-action-helper": "2.0.2"
  }
}