I ran into two problems when converting my code to assign_mapper for turbogears.
1. assign_mapper does not return the mapper as mapper does employee_mapper = assign_mapper(ctx, Employee, employees) manager_mapper = assign_mapper(ctx, Manager, managers, inherits = employee_mapper) Needs to be changed to assign_mapper(ctx, Employee, employees) assign_mapper(ctx, Manager, managers, inherits = Employee.mapper) I would suggest that assign_mapper return the defined mapper to match the original. 2. Do not use python super(XXX, self).__init__() in inherited mapped classes. This leads to runtime errors in sqlalchemy (3.7.1 and 3.8). It appears that oldinit () is called twice for the class leading to some strange session issues. While the examples in the sqlalchemy documentation do not use super, I didn't see it exressedly discouraged and thought it was pretty standard.. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---