AngularJS: Parent scope is not updated in directive (with isolated scope) two way binding

Question

I have a directive with isolated scope with a value with two way binding to the parent scope. I am calling a method that changes the value in the parent scope, but the chang

Answer 1

Using $apply() like the accepted answer can cause all sorts of bugs and potential performance hits as well. Settings up broadcasts and whatnot is a lot of work for this. I found the simple workaround just to use the standard timeout to trigger the event in the next cycle (which will be immediately because of the timeout). Surround the parentUpdate() call like so:

$timeout(function() {
    $scope.parentUpdate();
});

Works perfectly for me. (note: 0ms is the default timeout time when not specified)