Thanks for the response. I'm using trunk.
The documentation (http://www.djangoproject.com/documentation/db-api/ #select-related, under "new in development version" actually says: "You *can* refer to foreign keys that have null=True" (where 'can' is in italics) This is why I think the behavior is a bug; so should I file a bug report? (Although it also says "Note that, by default, select_related() does not follow foreign keys that have null=True."; it took me quite a while to realise that "by default" means "select_related is passed no arguments".. perhaps this could be reworded?) On Jun 26, 2:18 am, phillc <[EMAIL PROTECTED]> wrote: > yourversion of django before or after qsrf merge? > > select_related does not work well with relations that have null = True > > On Jun 24, 11:40 pm, bob84123 <[EMAIL PROTECTED]> wrote: > > > I'm having a problem with select_related; I'm not sure if it's a bug > > or a problem with my understanding of how it's supposed to work. > > > Here's some code: > > > from django.db import models > > > class Occurrence(models.Model): > > start_time = models.OneToOneField('TimeRepresentation', null = True, > > related_name = "occurrence_start") > > > class TimeRepresentation(models.Model): > > absolute_time = models.TimeField(null = True) > > > def do_test(): > > Occurrence.objects.all().delete() > > o2 = Occurrence.objects.create() > > > for o in Occurrence.objects.all(): > > if o.start_time != None and o.start_time.absolute_time == > > None: > > raise "this doesn't raise" > > > for o in Occurrence.objects.all().select_related('start_time'): > > if o.start_time != None and o.start_time.absolute_time == > > None: > > raise "but this does" > > > In each loop, I expect to get an Occurrence with start_time = None. > > The first loop works fine, but in the second loop, instead of getting > > start_time == None, I get an Occurrence with a non-null start_time but > > start_time.absolute_time is null. > > > Any ideas of what I should do about this? --~--~---------~--~----~------------~-------~--~----~ 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 -~----------~----~----~----~------~----~------~--~---
