I just upgraded to 0.4.2, and tried to take advantage of the fix available, but I'm confused. I have this code:
mapper(Resource, resources, polymorphic_on=resources.c.type, polymorphic_identity="empty", column_prefix='_', properties={ 'id': resources.c.id, 'url': synonym('_url', map_column=True), 'children': relation(Resource, backref=backref("_parent", remote_side=[resources.c.id])), 'parent': synonym('_parent', map_column=True), 'name': synonym('_name', map_column=True), 'type': resources.c.type, # NOTE: Remember to add here other columns that don't need # a custom property accessor, like the id. Otherwise, they # be available as _column_name, not column_name. }, save_on_init=False, ) Each of (url, parent, name) is a property in my class, as such: class Resource(object): def _get_url(self): """My docstring""" return self._url def _set_url(self, url): self._url = url url = property(_get_url, _set_url) Of course, the logic in the property code is much more complex than that. But when I try to import that module, it says this: [...] File "/usr/lib/python2.5/site-packages/SQLAlchemy-0.4.2-py2.5.egg/ sqlalchemy/orm/mapper.py", line 685, in _compile_property raise exceptions.ArgumentError("Can't compile synonym '%s': no column on table '%s' named '%s'" % (prop.name, self.select_table.description, key)) sqlalchemy.exceptions.ArgumentError: Can't compile synonym '_parent': no column on table 'resources' named 'parent' It seems that the problem is _only_ with 'parent'. Any ideas? And by the way, what does map_column do? Thanks. --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---