Additional Fields In Many_Many Relations

Hello everyone,

How can I save/update additional data in the pivot table of a MANY to MANY relations (I’m am using GIIX extension to create model e CRUD operations)?

Example:

USERS

id_user

username

EXAMS

id_exam

exams

USERS_X_EXAMS

id_user

id_exam

vote (this is an extra-primarykeys data)

date (another one…)

How can I manage the additional datas on the Insert/Update views?

Thanks,

Lilli