Filter on Expanded EntitySet

Hey Experts,

i created two entities with navigation. Now i would like to add a filter on the expanded entity set (line items).

URL looks like this:

../$filter=Class eq 'TC_KUNDE' and AttributeConsignee/Kunnr eq '10000'

I would like to filter on Class (Head Item) and Kunnr (Line Item).

Now the problem is that IT_FILTER_SELECT_OPTIONS is empty. Only IV_FILTER_STRING is filled.

Does anybody know how to convert the filter string into select options?

Multi-Level Expansion with GET_EXPANDED_ENTITYSET

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