Sortable List

components.sortable-list.js

import Ember from 'ember';

export default Ember.Component.extend({
  didInsertElement: function ()  {
    Sortable.create(this.get('element').querySelector('.steps'), {
      draggable: '.step',
      handle: '.handle',
      scroll: true,
      store: {
        get: ()=> {
          return this.get('list').sortBy('position').mapBy('id');
        },
        set: (sortable)=> {
          this.beginPropertyChanges();
          sortable.toArray().forEach((id, index)=> {           
            this.get('list').findBy('id', id).set('position', index);
          });
          this.endPropertyChanges();
        }
      }
    });
  },
  actions: {
    onRemoveItem (item) {
      this.sendAction('onRemoveItem', item);
    }
  }
});

controllers.index.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',

  actions: {
    removeItem: function (item) {
      this.get('model').removeObject(item);
    }
  }
});

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
	this.route('/');
});

export default Router;

routes.index.js

import Ember from 'ember';


function createInitial () {
  return [
    { id: 0, position: 0 },
    { id: 1, position: 1 },
    { id: 2, position: 2 }
  ];
}


export default Ember.Route.extend({
  model: function () {
    return Ember.ArrayProxy.create({ content: createInitial() });
  }
});

templates.application.hbs

{{outlet}}

templates.components.sortable-list.hbs

 <ul class="steps">
  {{#each item in model}}
    <li class="step" data-id={{item.id}}>
      <span class="handle" style="cursor: move">::</span>
      {{item.id}}
      <button class="remove" {{action "onRemoveItem" item}}>X</button>
    </li>
  {{/each}}
 </ul>

templates.index.hbs

{{sortable-list list=model onRemoveItem=(action "removeItem")}}

tests.helpers.destroy-app.js

import Ember from 'ember';

export default function destroyApp(application) {
  Ember.run(application, 'destroy');
}

tests.helpers.resolver.js

import Resolver from '../../resolver';
import config from '../../config/environment';

const resolver = Resolver.create();

resolver.namespace = {
  modulePrefix: config.modulePrefix,
  podModulePrefix: config.podModulePrefix
};

export default resolver;

tests.helpers.start-app.js

import Ember from 'ember';
import Application from '../../app';
import config from '../../config/environment';

const { run } = Ember;
const assign = Ember.assign || Ember.merge;

export default function startApp(attrs) {
  let application;

  let attributes = assign({rootElement: "#test-root"}, config.APP);
  attributes = assign(attributes, attrs); // use defaults, but you can override;

  run(() => {
    application = Application.create(attributes);
    application.setupForTesting();
    application.injectTestHelpers();
  });

  return application;
}

tests.test-helper.js

import resolver from './helpers/resolver';
import {
  setResolver
} from 'ember-qunit';

setResolver(resolver);

twiddle.json

{
  "version": "0.10.6",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "sortablejs": "//cdnjs.cloudflare.com/ajax/libs/Sortable/1.5.0-rc1/Sortable.min.js",
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.9.0",
    "ember-data": "2.9.0",
    "ember-template-compiler": "2.9.0",
    "ember-testing": "2.9.0"
  },
  "addons": {}
}