we've got plenty of MapperExtensions running. i dont see how you are getting mapper.extension to be your actual mapper, its supposed to point to a container called ExtensionCarrier (unless, you are saying mapper.extension = _MapExt(). not supported, unless you want to provide a property-based patch for it).
On Sep 7, 2007, at 11:12 AM, [EMAIL PROTECTED] wrote: > > or has something in MapperExt protocol changed? > > File "dbcook/usage/samanager.py", line 189, in query_BASE_instances > return session.query( m.plain ) > File "sqlalchemy/orm/session.py", line 638, in query > q = self._query_cls(mapper_or_class, self, **kwargs) > File "sqlalchemy/orm/query.py", line 31, in __init__ > self._extension = self.mapper.extension.copy() > AttributeError: '_MapExt' object has no attribute 'copy' > > i have very simple one, just for sanity checks: > > class _MapExt( sqlalchemy.orm.MapperExtension): > def before_insert( self, mapper, connection, instance): > assert (instance.__class__ is not mapper.class_, > 'load_only_object - no save: ' > + str( instance.__class__) + ':'+str(mapper) > ) > before_update = before_delete = before_insert > > _mapext = _MapExt() > > and using that one on all mappers which should be readonly. > > svilen > > > --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
