AngularFire equivalent to $setPristine? - angularjs

Question

I'm trying to understand the correct workflow to create a $setPristine equivalent with my Firebase data.
My workflow is as follows:
1) Create Firebase object (via the Angularfire Generator 'SyncData')
2) Form data modifies the $firebase object.
3) To update the remote model, I use myRef.$save()
All of that works well. Now, I'm trying to add a "reset" button on the form, so that the locally modified data will revert back to the remotely stored data.
So far, I'm running into problems. I've tried reinitializing the firebase reference eg myRef = syncData('/my/path') but not only does that now work, but it is destroying the remote data object!
What is the correct way to re-pull the remote data to use in my Angular model?

Answer 1

I know this is an old question, but I ran into this issue myself.
After some searching around I found this post: http://grokbase.com/t/gg/firebase-angular/1499haaq4j/editing-data-as-a-copy
Which led me to an outdated code snippet (2 months lol XD) from #Kato: https://gist.github.com/katowulf/8eaa39eab05a4d975cd9
I modified this to work with Firebase 2.3.1 and AngularFire 1.1.3:
app.factory('ResetFactory', function($firebaseArray) {
return $firebaseArray.$extend({
reset: function(itemOrIndex) {
var key, self;
self = this;
key = self.$keyAt(itemOrIndex);
self.$ref().child(key).once('value', function(snap) {
self.$$updated(snap);
});
}
});
});
Which can be called via:
var comments = new RevertFactory(ref.child('comments'));
# variable comment is for example an ng-repeat that's being edited
comments.reset(comment);