dictionary-observable.js

// mixins/dictionary-observable.js

import Ember from 'ember';

const {
  Mixin,
  on,
  run
} = Ember;

const { once } = run;

export default Mixin.create({

  dictionaryObservers: {},
  isRollingBack: false,

  addObservers() {
    const observers = this.get('dictionaryObservers');

    _.forEach(observers, (props, observer) => {
      _.forEach(props, (prop) => {
        const key = `${observer}.${prop}`;
        this.addObserver(key, this, 'dictionaryDidChange');
      });
    });
  },

  initObservers: on('didLoad', function() {
    this.addObservers();
  }),

  dictionaryDidChange(sender, key, value, rev) {
    if (!this.get('isRollingBack')) {
      once(this, 'dictionaryDirtiedModel');
    }
  },

  dictionaryDirtiedModel() {
    this.send('becomeDirty');
  },

  rollbackAttributes() {
    this.set('isRollingBack', true);
    this._super();
    this.set('isRollingBack', false);
  }

});