Hi SL,
It sounds like your association should point the other way. If, in the context of object A, you want a pick an associated object B, your model should show the following:
On the page with context A, you can show your reference selector for your list of Bs, and then you can have a data view over association to show information about the selected B.
When you change the value of B (dropdown) the values in the B datagrid will update to match the newly selected B.
I hope this helps!
hello, did you ever figure this out? i am having a similar issue