Malcolm, does select_related work with 1-to-1's (and thus would do the preloading)?
On Jun 28, 6:34 pm, Malcolm Tredinnick <[EMAIL PROTECTED]> wrote: > On Sat, 2008-06-28 at 16:29 -0700, Julien wrote: > > Hi, > > > You could try: > > > if hasattr(c, 'company') > > # This is a company > > else: > > # This is a person > > That will still cause a database lookup (possibly two, if the model > isn't a company). This is because there's no way to know which is the > most descendant table for a particular row in the parent table without > querying them all. So it requires a join that is O(# of descendents) in > size, which is the reason it isn't done by defualt. > > 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 -~----------~----~----~----~------~----~------~--~---
