sendAction --- targetObject

application.controller.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName:'Ember Twiddle',
actions: {
submit: function() {
            alert('controller');
        }
}
});

application.template.hbs

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

{{#foo-line as |value|}}
	<p>
		<h2>Nested component</h2>
    {{value.samp}}
		{{foo-bar action=(action value)}}
  </p>
{{/foo-line}}
{{foo-line}}

{{outlet}}
<br>
<br>

foo-bar.component.js

import Ember from 'ember';
export default Ember.Component.extend({
submit: 'submit',
//targetObject: Em.computed.alias('parentView'),  
actions: {
        foo: function() {
           console.log('hai');
           this.sendAction('action');
    }
}
});

foo-bar.template.hbs

<button {{action 'foo'}}>Trigger</button>{{yield}}

foo-line.component.js

import Ember from 'ember';
import mixin from 'demo-app/mixin'
export default Ember.Component.extend({
  'samp': 'samp',
actions: {
   submit: function() {
            alert('component foo');
        }
}
});

foo-line.template.hbs

{{#if hasBlock}}
	{{yield actions.submit}}
{{else}}
	<p>
		<h2>Nested component</h2>
		{{foo-bar action='submit'}}
   </p>
{{/if}}

mixin.js

export default Em.Mixin.create({
actions: {
submit: function() {
            alert('component foo');
        }
}});

twiddle.json

{
  "version": "0.4.16",
  "EmberENV": {
    "FEATURES": {}
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember.debug.js",
    "ember-data": "https://cdnjs.cloudflare.com/ajax/libs/ember-data.js/2.1.0/ember-data.js",
    "ember-template-compiler": "https://cdnjs.cloudflare.com/ajax/libs/ember.js/2.1.0/ember-template-compiler.js"
  }
}