🚀 go-pugleaf

I have two tables with master/detail relationship. master table have a
PK that is not auto-increase and detail has a PK that is
auto-increased and a FK to master table.
I implement that by two TADOQuerys, and set the detail query to
batchupdates so that to insert detail rows after master row. I've done
everything that online help emphasize, but when I insert detail rows
the detail Grid doesn't display these rows. But when i watch
detail->RecordCount it's correct.
It works well when using BDE's cacheupdates, but ADO's batchupdates.
My question is:
1.Is batchupdates only doing update but insert?
2.In application we often deal with master/detail such as Orders. In
BCB TDBGrid auto post changes when cursor moves, in my solution the
master PK haven't been inserted so I must cache inserted detail rows
up. Do I miss something to do that easily? I don't think Pre-Insert is
better.

thanks.