Apex 4.01 Tabular Form Issue javascript

Question

We have moved an apex 3.2 application to apex 4.0 and we have some problems with the new ordering of the G_Fxx-Colums as described in another thread.
There is another thing we do not understand:
The SQL-Statment is like
select a,
b,
apex_item.text(40,c) c
from table.
In java-script we access the data with
<script type="text/javascript">
function readOnly()
var mon_01 = document.getElementsByName("f01");
var mon_02 = document.getElementsByName("f40");
In Apex 3.2 both arrays started with 1.
In Apex 4.0 there seams to be a shift. The Data in mon_01 (j) correspondes to mon_02(j-1).
Any hint what happened ?
Thanks
Tilman

Answer 1

Habib,
There were issues in past releases of Oracle Application Express that caused the internal query column IDs to get out of sequence. That issues has been resolved in APEX 4.0.1. However if you import or upgrade older applications that had this issue in APEX 3.2 or before, then there's no guarantee that the fxx array assignments in 4.0 will be the same as in 3.2. So what you will need to do it to open your tabular form source query, and then hit apply changes, this will put the query column ID sequence in the correct order, and then run your tabular form, and take a note of the new fxx arrays assignments. And based on that information, adjust your JavaScript and / or PL/SQL code to reference the correct arrays. In APEX 4, there is now also a way to reference those arrays by the name of the underlying column using the apex_application.f_fmap array, this way, you won't have to reply on how the engine allocates those arrays anymore. Keep in mind, this allocation has always been done at runtime, so e.g. if you had conditional columns, then a column that's in some cases rendered as f05, might be rendered as f07 in other cases.
Regards,
Marc