On Monday, 9 June 2014 21:28:51 UTC+1, Tim Martin wrote: > > > On Monday, 9 June 2014 20:44:08 UTC+1, Tim Martin wrote: >> >> >> I'll go ahead and try to implement this using __neg__() to invert the >> ordering. >> >> > It's still pretty rough, but there's some code in > https://github.com/timmartin/django/tree/order_by_expressions that > appears to work. In particular, I haven't yet implemented the LowerCase and > related functions (I have one, but it's just a test hack), but that should > just be boiler-plate. > > And I should have noted that I haven't implemented detection of negation in contexts other than ORDER BY. It's not easy to do it cleanly with the simple approach I've got at the moment. The code could just check that get_ordering() returns ASC, but a) that's gross and b) it doesn't solve the problem of having unary negative on a subexpression, which would get ignored.
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