On Tue, 2008-09-23 at 07:01 -0700, coan wrote: > > I want to fetch a list of items in my database, and I have their id > ready: > my_ids_to_get = [ 1, 3, 2, ] > > In mysql I would fetch them like this: > SELECT * FROM table WHERE id IN (1, 3, 2) ORDER BY FIELD( id, 1, 3, > 2 ) > > This would preserve their order. > > Can I build this query with the native django order_by?
No. You can't pass arbitrary SQL functions to order_by. > > I can get the objects like this: > MyObject.objects.filter(pk__in=my_ids_to_get) > But I'm not able to build an order clause to use with it, and their > order is not preserved. > > Do I have to fall back on raw sql to do this? At the moment, certainly. At some point in the distant future, there's a better than average chance that there will be a general way to pass through literal SQL fragments in various places (including order_by()). But it's pretty far down the feature list at the moment and will always be fairly fragile in any case (because manipulations on query sets will have to treat such fragments as opaque strings and so won't be able to rename aliases inside them, etc). Regards, Malcolm --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
