DS.Snapshot#changedAttributes()

Returns all changed attributes and their old and new values.

Example

// store.push('post', { id: 1, author: 'Tomster', title: 'Ember.js rocks' });
postModel.set('title', 'Ember.js rocks!');
postSnapshot.changedAttributes(); // => { title: ['Ember.js rocks', 'Ember.js rocks!'] }