I'm building a portal for managing orders.
The typical form for order management UI is like that shown in this screenshot. There are two parts on the UI, the upper part is a form for inputing order basic info, and the lower part is a list for listing and just listing the associated order items.
I know this is easy to be realized in model driven app, we can use sub-grid as the list to just show the related order items there.
But for Power Pages, i didn't find how to associate the data of these two parts.
As we can see, the UI in this screenshot was built by Power Pages, the upper part is a form, and the lower part is a list, but how can we just show the order items of current order in the list?
Another question is, when creating, after we input the basic info on the upper part, then click Submit, the data will be submitted, at this moment we have no chance to input order items. So what is the best pratice to handle such master-detail scenario in Power Pages? I've tried multi-step form, but it also has such issue.
