The best I can come up with is to use SQLObjects 'magic attributes'
functionality to fake the foreign key reference. An example:
from turbogears.identity.model.somodel import User
class myUser(SQLObject):
fk_to_user = IntCol()
def _get_user(self):
return User.get(self.fk_to_user)
def _set_user(self, user_obj):
self.fk_to_user = user_obj.id
def _del_user(self):
u=User.get(self.fk_to_user)
u.destroySelf()
self.fk_to_user = None
# Other things you want to implement in your class...
Unless SQLObject defines a way to access other registry classes (which
I couldn't find), I think that's your simplest solution. If your
database supports it, it may be worthwhile to set up the foreign key
reference in your db schema, just to be sure.