How to change the dynamically LOV value to old value if it errors out

Question

We have an use case like when a value is selected from LOV, some validations(EO validations) occur on that and if the validation fails we are throwing exception.But the new value is appearing in LOV text box. We need to display the old value in the LOV if the validation fails. Can you please let me know if there is any way to do that?

Answer 1

After thinking about this, I wondered if I had mis-read the use-case....so I added #2
Please state your Jdeveloper version, and elaborate on your use-case:
*1. Are you saying that the LOV contains incorrect values that the user has chosen?*
If so you should restrict the LOV values to what is acceptable for the row (based on what other values are in the row)
By restricting the values in the LOV the wrong value can no longer be selected, you would not need to build in functionality to revert back to previous values.
I woud start by creating a view criteria for the view object the LOV is based on. The form values would send the binding variables to the view criteria, and that would then execute the query (invoking the view criteriea). The LOV would then contain some information on only acceptable values.
You may be able to adapt some of the ideas presented in this video (on cascading list boxes) to make your LOV work properly. http://youtu.be/WTevRnXq04o
This video shows some ways to manipulate view criteria: http://youtu.be/dX93fiBCxEg
*2. Are you saying that the user has selected other fields in the form -- validation on those fields fails, and you want to revert back, but the LOV still contains the values selected?*
In that case, you need to clear the values in the form and re-execute the view object -- and refreshing to the correct value.
Stuart
Edited by: Stuart Fleming on Sep 12, 2012 12:04 PM
Edited by: Stuart Fleming on Sep 12, 2012 6:52 PM
Edited by: Stuart Fleming on Sep 12, 2012 6:52 PM