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?
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