qwerty

controllers.application.js

import Ember from 'ember';
import { task } from 'ember-concurrency';
import { inject as service } from '@ember/service';
import { computed } from '@ember/object';

export default Ember.Controller.extend({
  store: service(),
  items: computed(function() {
    let store = this.get('store');
    return [
      store.createRecord('item', { skipped: true })
    ];
  }),
  doThis: task(function*(item) {
    item.set('skipped', false);
    try {
      yield item.save();
    } catch (e) {
	    item.set('skipped', true);
    }
  })
});

models.item.js

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

export default Model.extend({
  skipped: attr('boolean')
});

templates.application.hbs

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

{{#each items as |item|}}
	<button {{action (perform doThis item)}}>Do this</button>
{{/each}}

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "2.18.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "2.13.2",
    "ember-concurrency": "0.8.19"
  }
}