How can use a button when a validation fail

Question

Hi,
This is my 'scenario'
In a form I have a button that call a LOV and an Item_code field.
The Item_code field is validated from a trigger with a code like this:
select Desc into Item_desc from Table1 where Table1.Id = Item_code;
exception when no_data_found then
DISPLAY_MESSAGE('Error Code', 'Not Found') ;
raise form_trigger_failure;
All work fine, but I am not be able to use the Search button. The focus is on the Item_code field and if I try to click on the button a message error is displayed.
Please, how can resolve this problem ?

Answer 1

Just do the following:
If :Item_code is not null then
select Desc into Item_desc from Table1 where Table1.Id = :Item_code;
end if;
exception
when no_data_found then
:Item_code := NULL;
:Item_desc := NULL;
DISPLAY_MESSAGE('Error Code', 'Not Found') ;