Sorry for waking up old topic but it is important for me.

It doesn't seem to work for me.

When I call such rollback function during onChange event I get strange situation that value of combobox is reset to oldValue but in ui it looks like new value was selected. So I have combobox displaying "YES" but when I check its value it is "NO"

Does anyone have runnig example how to successfully recover oldValue in combobox if for example database operation failed?