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Caculated / Transiant attribute being set to null after filtering or sorting

Paul (MITsa)Feb 6 2025

JDeveloper 12c

Hi

We have the usual EO -> VO -> af:table set up.

In or VO we have a list of values which sets its own attribute and a secondary attribute (AttribNr) which doesn't need to be persisted.

AttribNr value is used in several other backing bean methods.

The value is set as a secondary return value from a list of values.

In the VO AttribNr is marked as "Calculated AttribNr'

When running our application AttribNr is set correctly but as soon as a filter is applied to the af:table AttribNr becomes null.

We have tried to create a transient EO attribute but the same problem occurs.

The only way to prevent AttribNr from being set to null after a filter is applied to the af:table is to mark the EO attribute as persistant, but then the auto generated EO insert/update query contains AttribNr in the field list but as AttribNr doesn't exist in the database table the query fails. (which is understandable)

How can we create a transient/calculated VO attribute which doesn't become null after a filter.

Thanks in advance
Paul

Comments

Sdhamoth-Oracle Oct 16 2024

Check the error reported in “Control panel→System and Securities→Administrative Tools→Event Viewer” under Windows Log→Application.

How did you set the Instant Client path in PATH? In command prompt?

If you have set it in a command prompt, then make sure you start that command prompt as administrator (i.e. opening it by right clicking on command prompt icon and select “run as administrator” from popped context menu). Also, you should start ODBC data source administrator by executing “odbcad32” from that command prompt. Have you?

pczurak-JavaNet Oct 16 2024

Yes I started the cmd as run as Administrator.

I am using ODBC 64 bit not 32 bit.

I set the path using Windows UI (System properties), and if I open a cmd window and type set I can see the correct path.

starting “odbcad32” from the command line did not help.

I tried the same process on a different computer and got the same results.

Sdhamoth-Oracle Oct 16 2024

odbcad32 is for ODBC 64 bit on Windows x64 versions. You need to start odbcad32 from syswow64 directory to configure ODBC 32 bit on Windows x64 versions.

Have you checked the Application error logs in Event viewer? Did you find any error related to your ODBC application?

pczurak-JavaNet Oct 16 2024

I am running the 64bit version, if I start odbcad32 from syswow64 it starts the 32bit version.

There are no errors in the Event Viewer.

pczurak-JavaNet Oct 17 2024

I have tried basic driver version 19.24, but when I click on the Test button, I get the following error:

---------------------------
Testing Connection
---------------------------
Unable to connect
SQLState=S1000
[Oracle][ODBC][Ora]ORA-12504: TNS:listener was not given the SERVICE_NAME in CONNECT_DATA

---------------------------
OK
---------------------------

Sdhamoth-Oracle Oct 17 2024

Looks like the service name is missing in your connection string.

Here is a sample of connection string:

sales=
(DESCRIPTION=
(ADDRESS= (PROTOCOL=tcp)(HOST=sales-server)(PORT=1521))
(CONNECT_DATA=
(SERVICE_NAME=sales.us.acme.com)))
The part that is highlighted with bold characters seems to be missing in your connection string. Fix it.

pczurak-JavaNet Oct 17 2024

This is what I am using.

JDEPRD =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = testoda0)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = jdeprd.test.com)
)
)

Sdhamoth-Oracle Oct 17 2024

Are you able to connect to your database using SQL*Plus?

pczurak-JavaNet Oct 17 2024

No:

F:\instantclient_23_5>sqlplus

SQL*Plus: Release 19.0.0.0.0 - Production on Thu Oct 17 07:55:39 2024
Version 19.24.0.0.0

Copyright (c) 1982, 2024, Oracle. All rights reserved.

Enter user-name: testuser
Enter password:
ERROR:
ORA-12560: TNS:protocol adapter error

Enter user-name:

pczurak-JavaNet Oct 17 2024

The issue is fixed

In the ODBC Driver Configuration.

For the TNS Service Name you cannot type the name even if you type it exactly as it shows in the dropdown, you must select it from the dropdown, otherwise it won't work.

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Post Details

Added on Feb 6 2025
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