Each expression must be able to define it's own ordering because order_by allows you to define a sort based upon multiple expressions.
On Mon, Jun 9, 2014 at 4:00 PM, Daniel Moisset <[email protected]> wrote: > 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 > <https://groups.google.com/d/msgid/django-developers/CALuYSZVYnXHapfvf5SwPJxLYkxiv%3DTPyJg2XYGFVhCPSyc7Fgw%40mail.gmail.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/CAGdCwBuHBtQLsVEeftfZAVrx6hdZSvz9ED%3DMmjZvyg%2B--%3D6moQ%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
