Change value of a field, based on another fiekd, before insert...

Question

I have this situation: I have to generate a code (this happens through a database function) on the moment a new record is saved. This code is based on another field of that record (parameter passed to the function). I (have to) use Apex 3, so I can't use functionality of Apex 4.
So to be concrete: I have a registration program of books. Eacht book has a unique library code (this is not the PK). The labrary code is based on the year of publication (e.g. B2010-00035). So once a new book is entered, before saving, the year of publication (e.g. 2010) is checked, and throug a database function (e.g. f_get_new_library_code(2010) returns "B2010-00036") the library code has to be filled out.
How can I do this on the best way, taking into account I can't use Dynamic Actions of Apex 4 (unfortunatly).

Answer 1

Hi,
If you had specified the type of Form the answer would have been more to the point !
If its a single row form then you can write a OnSubmit Computation where in you call your function.
If its a Tabular Form then you have to write a OnSubmit After Comp & Val process where you will iterate through the apex_application.g_f arrays and update the required arrays.
Regards,