[web2py] Re: Update application without deleting tables

[pbreit]

I believe this will do it although I have not tested:

        # ## if none, they will be created
        settings.table_group = True
        settings.table_membership = True
        settings.table_permission = True
        settings.table_event = True

I usually just ignore them. One thing I do is turn off automatic group 
creation for each user: settings.create_user_groups = False