In YUI3, is there a way to "reset" models to the previous saved values?

Question

I'm using models in yui3, and although there are functions like reset() and undo(), they don't quite accomplish what I'm looking for.

I set values at different times, but may want to just undo everything to the point of the last save... is there a way to do so at this time?

Answer 1

In 3.5.0pr2 (pr2 is currently on the Yahoo! CDN; 3.5.0 GA will be released in mid-March), you can try something like this:

var MyModelClass = Y.Base.create('mine', Y.Model, [], {
    initializer: function () {
        this._saveState();
        this.after('save', this._saveState);
    },
    _saveState: function (e) {
        this._lastState = this.toJSON();
    },
    restoreLastSaved: function () {
        this.setAttrs(this._lastState);
    }
});