AngularJS, Populating dependent Combobox

Question

What I am trying to achieve is to populate a child combobox with items which depend on a \'parent\' combobox.

To clarify the - or better my - problem, I have created

Answer 1

You can add a watcher to the controller like this. You can also remove the empty item when you pick different value of the first drop down list.

$scope.$watch('currentGroup', function () {
    $scope.currentItems = $scope.currentGroup.Items;
    $scope.currentItem = $scope.currentGroup.Items[0];
});

Demo