I want to run checking code on a Ubercart product field attribute before allowed to proceed with the checkout. The code could run right below or in conjunction with the "required" - not empty - check.
But looking at the attributes module I do not see where it runs from. Trying to use the Ubercart Field Attributes module to do this on the fly with Ajax and JQuery my code is running without syntax error but also the form_set_error is not working as I am trying to use an Ajax callback.
No message comes up on the product form.
Both the attributes and field attributes work to throw the errors if the fields are empty as should be, but if I knew where the "required" error could originate I could piggyback my code there for this singular product class item
The Ubercart forums pages seem to be down
Can anyone point me to where that "required" checkbox code is in the attributes system ??