Page Process Does Not Work When Column for APEX_ITEM.HIDDEN is not shown

Question

I have created a Report Region based on a SQl Query. In the query I have three columns that need to be within an array, but 2 of the 3 columns should not be displayed on the report. Therefore, I don't have Show checked for them in the Column Attributes of the Report Region.
In my testing, if I don't display the columns that are within the arrays on the report and run the page process to insert records into a table, I receive the error of "no data found". In reverse, if I display the columns, my insert is successful.
Is this how the arrays work? Or is there something I have not done correctly.
Below is the query for the Report:
SELECT APEX_ITEM.CHECKBOX(1,ROWNUM,'CHECKED')ATTENDED,
APEX_ITEM.HIDDEN(2,C.PARTY_ID) ID, -----this is the column I want to hide-----
APEX_ITEM.HIDDEN(3,C.PARTY_TYPE_CODE) PTYP, ----this is the column I want to hide----
C.PARTY_TYPE_CODE,
S.PERSON_ID,
S.PERSON_FIRST_NAME AS NAME,
C.PARTY_CASE_ID
FROM CASE.PARTY C
INNER JOIN DN.PERSON S
ON C.PARTY_ID = S.PERSON_ID
WHERE C.PARTY_CASE_ID = :P18_CDBCASE_ID
AND C.PARTY_SEQ_NO = :P18_SEQ
Thanks,
Keisha
Edited by: user4579720 on Sep 16, 2009 2:30 PM

Answer 1

Keisha,
If you uncheck the "show" option, then the corresponding HTML for that item is not rendered on the page. Thus, when you try to inspect that item via APEX_APPLICATION.G_F02, it simply doesn't exist.
One trick that I use when I want to have hidden items on the page, but not make them take up any space, is to concatenate them to items that will be visible.
Using your query as an example, I would re-write it like this:
SELECT APEX_ITEM.CHECKBOX(1,ROWNUM,'CHECKED')ATTENDED,
APEX_ITEM.HIDDEN(2,C.PARTY_ID)
  || APEX_ITEM.HIDDEN(3,C.PARTY_TYPE_CODE)
  || C.PARTY_TYPE_CODE PARTY_TYPE_CODE,
S.PERSON_ID,
S.PERSON_FIRST_NAME AS NAME,
C.PARTY_CASE_ID
FROM CASE.PARTY C
INNER JOIN DN.PERSON S
ON C.PARTY_ID = S.PERSON_ID
WHERE C.PARTY_CASE_ID = :P18_CDBCASE_ID
AND C.PARTY_SEQ_NO = :P18_SEQThus, the second APEX report column will contain the HTML for the hidden items PARTY_ID & PARTY_TYPE_CODE, as well as the value for PARTY_TYPE_CODE. When you submit the page, you should not encounter any issues.
Thanks,
- Scott -
http://sumnertechnologies.com/
http://spendolini.blogspot.com/