Collections - Delete Entry Throws Error

Question

I'm using four collections on a form. When the user updates the form by selecting the "blank" at the top of the select list one entry in one of the collections, the user gets an integrity constraint error - parent key not found. The collection uses a select list from an LOV. I suspect the item in the collection is displaying the blank but not really getting dropped? When I created these collections EONS ago, I created '-None-' as an item in the LOV as a work-around so the user could choose when deleting the item. We are now finally going live and I want to clean this up.
Any ideas?
Thanks and have a great weekend!
Alexandra

Answer 1

Sorry - don't know why 'code' '/code' didn't work...
Hi Peter - I get an integrity constraint error, I think because though I'm deleting the display of the item in the collection, it's not really being deleted???
code
ORA-02291: integrity constraint (SPICE_HUNTER1.DOC_SUBJECT_REF_FK1) violated - parent key not found
/code
First of all, I have a getID process setup Before Header to dump the parent ID into the form so that the collections have an ID on which to link to the main form. The form has a bunch of fields above the collections and there are four collections at the bottom of the page, and is used to catalog documents. Sooooo the main part of the form above has fields for the form number, title, type, etc. and then each collection at the bottom of the form holds specfic references. The example below holds subject references. The other three hold lists of who's responsible, associated documents to the main form, and to whom the document is distributed. The collections work beautifully except when the user needs to delete one of the items. I set these up a long time ago and I'm now sure for the reason of this error, I just added 'None' to LOV's of each collection so that if the user needed to delete an entry, '-None-' could be selected. I tried using '%'||'null' in the LOV when creating the form, but couldn't get it to work, but I'm thinking this may be close to what I need to do?
And now that I think about it, if there are five items in the list and the user deletes the third item, it would be great if the list could refresh so there's not a hole in the list, i.e., One, Two, BLANK, Four, Five.
Thanks for your help!
code
ORA-02291: integrity constraint (SPICE_HUNTER1.DOC_SUBJECT_REF_FK1) violated - parent key not found
/code
Here's how I have each collection set up:
Create the Dataset Process - After Header
code
apex_collection.create_or_truncate_collection
(p_collection_name => 'MY_SUBJECT_COLL');
DECLARE
v_id NUMBER;
var1 NUMBER;
var2 NUMBER;
var3 NUMBER;
rw_ct INTEGER;
cursor c_prepop is
select subject_ref_id, doc_info_id, docno_id, subject_id
from DOC_SUBJECT_REF
where DOCNO_ID = :P3_DOCNO_ID
ORDER BY 1;
i NUMBER;
cntr NUMBER := 15;
BEGIN
select COUNT(*) into rw_ct from DOC_SUBJECT_REF
where DOCNO_ID = :P3_DOCNO_ID
ORDER BY 1;
cntr := cntr - rw_ct;
OPEN c_prepop;
LOOP
FETCH c_prepop into v_id, var1, var2, var3;
EXIT WHEN c_prepop%NOTFOUND;
APEX_COLLECTION.ADD_MEMBER(
p_collection_name => 'MY_SUBJECT_COLL',
p_c001 => v_id,
p_c002 => var1,
p_c003 => var2,
p_c004 => var3
END LOOP;
CLOSE c_prepop;
for i in 1..cntr loop
APEX_COLLECTION.ADD_MEMBER(
p_collection_name => 'MY_SUBJECT_COLL',
p_c001 => 0, --subject_ref_id
p_c002 => :P3_DOC_INFO_ID,
p_c003 => :P3_DOCNO_ID,
p_c004 => 0
end loop;
END;
/code
Create the Form
code
SELECT APEX_ITEM.SELECT_LIST_FROM_LOV(4, c004,'SUBJECT', NULL,'YES', 0, '') SUBJECT
FROM APEX_COLLECTIONS
WHERE COLLECTION_NAME = 'MY_SUBJECT_COLL'
/code
Capture the Data
code
declare
j pls_integer :=0;
begin
for j1 in(
select seq_id from apex_collections
where collection_name = 'MY_SUBJECT_COLL'
order by seq_id)loop
j:=j+1;
apex_collection.update_member_attribute(p_collection_name=>'MY_SUBJECT_COLL', p_seq=>j1.seq_id,p_attr_number=>4,p_attr_value=>wwv_flow.g_f04(j));
end loop;
end;
/code
Write data to the DB
code
declare
begin
for y in (select TO_NUMBER(c001) x_key, TO_NUMBER(c002) x_1, TO_NUMBER(c003) x_2, TO_NUMBER(c004) x_3
FROM APEX_COLLECTIONS
WHERE COLLECTION_NAME = 'MY_SUBJECT_COLL' AND c004 IS NOT NULL ORDER BY x_key) loop -- Updated
--WHERE COLLECTION_NAME = 'MY_SUBJECT_COLL' ORDER BY x_key) loop
if y.x_key = 0 and y.x_3 > 0
THEN
insert into DOC_SUBJECT_REF(subject_ref_id, doc_info_id, docno_id, subject_id)
values(DOC_SUBJECT_REF_SEQ.nextval, y.x_1, y.x_2, y.x_3);
elsif y.x_key > 0 then
update DOC_SUBJECT_REF
set
doc_info_id = y.x_1,
docno_id = y.x_2,
subject_id = y.x_3
where subject_ref_id = y.x_key;
else
DBMS_OUTPUT.PUT_LINE ('There’s an error.');
end if;
end loop;
end;
/code
Edited by: userRRRYB on Apr 11, 2011 3:03 PM