I'm looking for a way to have ephemeral data stored inside an AngularFire three-way-bound object (such as state) but I can't find a good way to prevent it from persisting that data back to Firebase - the only way I've found so far is to prefix it with $ which I suspect might be wrong.
I've read the following:
Angular.js does not report variables prefixed with $ to any $watch listeners. a simple workaround here is to use a variable prefixed with _, which will not be saved to the server, but will trigger $watch.
But it doesn't work for me, i.e. the following code:
shelf._editingName = false
saves _editingName: false back to Firebase (shelf is part of a larger array which is all three-way-bound).
What am I doing wrong? Is the quote above still correct? Is there anything really wrong with using a $ prefix?