I have an object called Zone.
Zones have Accounts.
Accounts have SupplyRequests
SupplyRequests have SupplyItems - much like an invoice.
SupplyItems are selected from StockSupplies that are assigned to each Zone. The user starts by opening the Zone, then an Account, then creating a SupplyRequest. When adding Items to the SupplyRequest, I need to filter StockSupplies for the current zone but since the SupplyRequest is not yet created, the Zone is not in context and I cannot filter on it. I have tried putting a Zone attribute in the SupplyRequest and SupplyItem BOs and initializing the Zone but it doesn't work. How can I filter on Zone during the object creation process?
