Update using Apex_item.hidden help

Question

Hi,
I want to update a table using apex hidden item as reference. But while updating, I encounter an error as invalid number. Here ID is the primary key column which is of datatype number.
Below is my report query
Select
ID,
DAYS_SPAN,
comments,
apex_item.hidden(1,ID)||APEX_ITEM.SELECT_LIST(2,Action,'A,B,C,D') "Attachment Action",
from TBL_ACTION_LIST
where ITEM_ID = :P5_ITEM_ID
I have written an after submit process as follows,
BEGIN
FOR i IN 1..APEX_APPLICATION.G_F01.COUNT LOOP
UPDATE TBL_ACTION_LIST
SET
Action= APEX_APPLICATION.G_F02(i)
WHERE ID = to_number(APEX_APPLICATION.G_F01(i));
END LOOP;
END;

Answer 1

Put some debug message in ur code to see the value of APEX_APPLICATION.G_F01 each time to make sure that you are actually getting a number in that.
Another simple thing that you could do is(for debugging), assign an variable with the APEX_APPLICATION.G_F01's value inside the loop. Write an exception that raises with the original error message concatenated with the variable's value.
DECLARE
  lc_debug VARCHAR2(4000);
BEGIN
  FOR i IN 1..APEX_APPLICATION.G_F01.COUNT LOOP
    lc_debug := APEX_APPLICATION.G_F01(i);
    UPDATE TBL_ACTION_LIST
    SET
    Action= APEX_APPLICATION.G_F02(i)
    WHERE ID = to_number(APEX_APPLICATION.G_F01(i));
  END LOOP;
EXCEPTION
WHEN OTHERS THEN
  RAISE(-20999, ' ID Value: '||lc_debug
                       ||CHR(10)||SQLERRM
END;If required check the F02 array value too(the DB column for ACTION is varchar2, isn't it ?).
This should show you the ID value which raises the error.