I created a test page using a domain model of Order <-- OrderItem. On a page, I have a listen to dataview which shows the OrderItems for a selected Order. In my case, sorting can be done on the nested grid, as below. Is this what your scenario is like?
Snapshot of how I selected the nested OrderItems
I can only do eitehr from database (which has sort order) or over association (which does not), how do you do from database over association, it is through Xpath?
Thanks, it worked!