2007/3/28, Merric Mercer <[EMAIL PROTECTED]>: > > I am currently creating a query set of a Model. I'm then iterating > through the query set to create a calculation called "total". > At the end of each loop I am adding "total" to the query set. Example:- > > qs= Cash.objects.all() > for i in qs: > # calculate total > i.total = total > > Note: The Cash object has no data field called "total". I don't want > to save this to the database because it is different for each user, so > its created dynamically > for each view. > > So far so good. This works very well and allows me to iterate over the > query set and the dynamically created attribute "total" in the template. > > However, I would now like to sort the qs using "total.". Since there > is no record in the DB I'm guessing that order_by will not work. Can > anybody advise on a way.
You can make a custom sort_ by_total() function, create a list from the queryset result and sort the list with sort() and sort_by_total. I remember doing that some time ago and it worked but if the queryset result is big you can suffer of performance problems. Regards. -- Marcelo Ramos Fedora Core 6 | 2.6.19 Socio UYLUG Nro 125 --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-users@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/django-users?hl=en -~----------~----~----~----~------~----~------~--~---
