The model is loaded at every request. Instead of this
> if request.controller == 'mail' or request.controller == 'address_book':
> db.define_table('contact',
> Field('name'),
> ....
> )
you can just put this
> db.define_table('contact',
> Field('name'),
> ....
> )
into
modes/mail/address_book/db.py
