Hi there, I'd like to be able to run sorted() on a list of model objects without class-specific code which sorts based on what's specified in __mapper_args__['order_by'].
To do that, I would add __lt__(), __le__(), __gt__(), and/or __ge__() to the declarative base class, which try to get the order_by specification from the mapper and behave accordingly. My problem is now to find the correct programmatical way to get the class attribute name and whether to sort reversed or not. With instance.__mapper__.order_by, I can get the list of expressions, from which I can extract the attribute name, if it's just a plain attribute. But when its order_by=[desc(column)], I only get an sqlalchemy.sql.expression._UnaryExpression from which I can't figure out the correct way to get what I need (....elements would contain the column, but I can't find the place where I see that it's descending order). Can someone help me on this? Regards, Moritz -- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at http://groups.google.com/group/sqlalchemy?hl=en. For more options, visit https://groups.google.com/groups/opt_out.
