I see everyone trying to put the direction (ascending vs decending) inside the expression, while it's actually a property of the ordering clause. Wouldn't it make more sense and avoid ambiguities to do:
qs.order_by(..., descending=True) ? Then you can add functions (and even a __neg__ operator to fields mapped to SQL unary minus) and still have a clear separation of functions vs order direction. D. On Mon, Jun 9, 2014 at 4:44 PM, Tim Martin <[email protected]> wrote: > My concern about the filter(foobar_lt=-F('baz')) issue is that it > violates the principle of least surprise: it will be accepted silently and > do something that nobody could expect unless they know a bit about the > internals. However, I think having some special case code in filter(), > annotate() and anything else that takes expressions would be OK. Provided > it throws some kind of exception, I think it resolves my concern. > > I'll go ahead and try to implement this using __neg__() to invert the > ordering. > > Tim > > -- > You received this message because you are subscribed to the Google Groups > "Django developers" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/django-developers. > To view this discussion on the web visit > https://groups.google.com/d/msgid/django-developers/20cd8bd0-9d5d-4ed3-9748-1412188e6726%40googlegroups.com > <https://groups.google.com/d/msgid/django-developers/20cd8bd0-9d5d-4ed3-9748-1412188e6726%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Django developers" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/django-developers. To view this discussion on the web visit https://groups.google.com/d/msgid/django-developers/CALuYSZVYnXHapfvf5SwPJxLYkxiv%3DTPyJg2XYGFVhCPSyc7Fgw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
