On Mar 21, 2010, at 6:20 PM, Matthew wrote: > I got around this by switching to declarative and declaring my > property like this: > > _id = column_property(Column("id",Integer,primary_key=True), > comparator_factory=some_comparator_factory()) > > And then used @synonym_for for the getter: > > @synonym_for("_id") > @property > def id(self): > return some_function(self._id) > > I'm still not sure what was wrong with my original code, so would be > interested in any comments, for academic reasons.
your original test appeared to have a class descending from object. comparable_using applies to declarative classes. If you were using mapper(), you'd take the output from comparable_using and pass it to the "properties" dictionary of mapper() - but more likely you'd use comparable_property() directly pass your comparator straight in to column_property(), as introduced in http://www.sqlalchemy.org/docs/mappers.html#custom-comparators and linking to an example at http://www.sqlalchemy.org/docs/reference/orm/mapping.html#sqlalchemy.orm.comparable_property . > > Thank you! > > Matthew > > -- > You received this message because you are subscribed to the Google Groups > "sqlalchemy" group. > To post to this group, send email to sqlalch...@googlegroups.com. > To unsubscribe from this group, send email to > sqlalchemy+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/sqlalchemy?hl=en. > -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalch...@googlegroups.com. To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en.