I would like to expand the filter on party list to be able to view only from a category. I understand i have to create a module for it, in this module create a classe party (the same name) and add something.
i understood that categories are a many2many thus are managed by a rel_table. I know how to do it in sql but i do ot yet understand to manage it on tryton.
Is there somewhere (on this side of the rainbow) a similar think i can study to understand how to do it ?
thanks in advance.