https://stackoverflow.com/questions/45043420/using-select2-addon-with-ember-cli

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({  
  appName: 'Ember Twiddle',
  name:'',
  patients: Ember.computed('model',function(){
  	return this.store.peekAll('patient')
	}),
});

models.patient.js

import Model from "ember-data/model";
import attr from "ember-data/attr";
import { belongsTo, hasMany } from "ember-data/relationships";

export default Model.extend({
  name:attr('string')
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  model(){
    this.store.createRecord('patient',{name:'patient1'});
    this.store.createRecord('patient',{name:'patient2'});
    return this.store.peekAll('patient');
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{#power-select-multiple
  options=patients
  selected=name
  placeholder="Select some names..."
  onchange=(action (mut name))
  as |patient|
}}
  {{patient.name}}
{{/power-select-multiple}}
<br>
{{outlet}}
<br>
<br>
<div id="ember-basic-dropdown-wormhole"></div>

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-data": "2.12.1",
    "ember-power-select": "1.8.0"
  }
}