controller bind

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  
  actions: {
    actionThatShouldNotBeOverriden() {
    	console.log('yay');
    }
  }
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model() {
    return { foo: 'bar' };
  },
  
  actionOne() {
    this.set('controller.model.foo', 'Mutation 1!');
  },
                                  
  actionTwo() {
    this.set('controller.model.foo', 'Mutation 2!');
  },
    
  setupController(controller) {
    this._super(...arguments);
    
    if (!controller.get('actions')) controller.set('actions', {});
    
    controller.setProperties({
      'actions.actionOne': this.get('actionOne').bind(this),
      'actions.actionTwo': this.get('actionTwo').bind(this)
    });
    
    if (controller.get('actions.actionThatShouldNotBeOverriden')) {
      this.set('controller.model.baz', 'The native controller action is still defined :)')
    }
  }
});

templates.application.hbs

<h1>Welcome!</h1> 

<button onclick={{action "actionOne"}}>do actionOne!</button>
<button onclick={{action "actionTwo"}}>do actionTwo!</button>
<button onclick={{action "actionThatShouldNotBeOverriden"}}>do actionThatShouldNotBeOverriden!</button>

<br>
<br>
{{model.foo}}
{{model.baz}}
<br>
<br>

twiddle.json

{
  "version": "0.15.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.4.3",
    "ember-template-compiler": "3.4.3",
    "ember-testing": "3.4.3"
  },
  "addons": {
    "ember-data": "3.4.2"
  }
}