Problems with Listobject based on a recordgroup

Question

Hi all,
I have three problems with a Listobject (popup-_list) showing the records of a recordgroup.
The recordgrroup is created programatically in the WHEN_NEW_FORM_INSTANCE-Trigger of the form. It shall be the source of a ListObject. The values of the recordGrpoup and therfore also of the Listobject depends on the values of an master-datablock. Changing the values of the masterblock, the recordgroup must be requeried and the listobject must be repopulated.
1. When opening the form, the masterblock is empty. Same I want to have the listObject empty. An empty recordGroup seems not to be applied to the ListObject. Is there any possibility?
2. My sql-statement of the recordgroup works with a global variable like so:
:global.grpartid := '1004';
group_id := create_group_from_query
('grpLagorte', 'SELECT evm_a_lagort.bez, evm_a_lagort.lagort_id from evm.evm_a_lagort, evm.evm_n2m_artikel_lagort where EVM_n2m_artikel_lagort.H_MANDANT = m.EVM_A_lagort.H_MANDANT AND evm.EVM_n2m_artikel_lagort.lagort_ID = evm.EVM_A_lagort.lagort_ID and evm.evm_n2m_artikel_lagort.artikel_id = ''' ||:global.grpartid||'''');
I would prefer to replace the global variable with an item from my master datablock, but that seems not to work.
3. I have to requery the group and repopulate the list when changing the master-data.
declare     
status                NUMBER;
     list_item          item := find_item('evm_jn_a_l.lst_lagort');
begin
:global.grpartid := :evm_a_artikel.artikel_id;
status := populate_group('grpLagorte');
message ('Status: ' || status);
message ('artikel_id: ' || :evm_a_artikel.artikel_id);
message ('Global: ' || :global.grpartid);
if status = 0 then
     populate_list(list_item, 'grpLagorte');
else
     message('Fehler bei Abfrage der Datensatzgruppe');
end if;     
end;
The messages show the right values
status = 0
artikel_id = the choosen next one
global.grpartid = the next artikel_id
The content of the Listobjet does not change.
Its a problem of the recordgroup (How can I figure that out?) or its a problem of the listObject or anything else?
Help would be very appreciated and the problem is a bit urgent.
Thanks
Silke

Answer 1

Silke,
I may not have the answer to all of your questions.
1. If you do a clear_list on the list item and, prior to this, assign it a null value. Does this work, assuming you didn't set the "other" property ?
2. What if you do
_artikelId varchar2(100);
_artikelId:= :block.item;
group_id := create_group_from_query
('grpLagorte', 'SELECT evm_a_lagort.bez, evm_a_lagort.lagort_id from evm.evm_a_lagort, evm.evm_n2m_artikel_lagort where EVM_n2m_artikel_lagort.H_MANDANT = m.EVM_A_lagort.H_MANDANT AND evm.EVM_n2m_artikel_lagort.lagort_ID = evm.EVM_A_lagort.lagort_ID and evm.evm_n2m_artikel_lagort.artikel_id = ''' ||_artikelId||'''');
You should be able to do the same using global variables, in case you need it to be global
3. I don't see whats wrong with the list, maybe you can try to do a clear_list before repopulating it. If this doesn't help try the "magic bullet" and call
synchronize;
after populating the list. I checked if there is a bug filed on this issue for Forms 6i (I remember that you are using Forms 6i) but there is none. So the component should be fine.
Frank