LOV for Editable Primary Key in ADF Table Problem

Probably every ADF developer at least ones was facing this problem - creating LOV for editable primary key attribute rendered in ADF table. Very often database design is based on business key and there is requirement to create LOV for that
key. Unfortunately ADF doesn't handle this case well - LOV defined for editable key in the table is unstable. There are different workarounds, but all of them with the side effects. The best workaround is to fix database design and introduce surrogate key
for the table - but in practice is hardly possible, no one wants to change DB design, especially if it works well in Oracle Forms.

My idea was to upload sample application with this use case into Oracle Cloud. Everyone could access and test it, I'm sure most of you had reproduced same error in your projects. Ideally - Oracle ADF should handle LOV for editable primary key.
Please access live sample application on Oracle Cloud and see it yourself -EditableTableKeyApp
on Oracle Cloud. Same application can be downloaded - EditableTableKeyApp.zip.

Here is how you can test it live. Open application on Oracle Cloud, you should get Employees table displayed:





Open EmployeeId LOV - you will see Departments data, this is correct. I was using numeric Department Id to return into Employee Id - this is just for test, to avoid numeric data duplication. Select value from LOV and try to return it:





Infamous error will be generated - Target Unreachable, identifier 'row' resolved to null:





This happens only for LOV defined on primary key attribute. LOV defined for non key attributes works well in ADF table.

This problem is not reproduced with ADF form, same LOV works:





Value was returned without issues:





This is why I was proposing option to use ADF form for editing data from the table - CRUD
Operations in Oracle ADF 11g Table Without Auto PPR.

By the way - Oracle Java Cloud runs with JDBC XA driver, this is not compatible with ADF BC for Rollback operation. If you click Undo button and invoke Rollback operation - your data will disappear:





Click again Undo couple of times - data will be back.

In this sample I was using LOV defined on primary key attribute and rendered with editable table:





URL : http://andrejusb.blogspot.jp/2013/01/lov-for-editable-primary-key-in-adf.html