Try parent__isnull=True.
http://www.djangoproject.com/documentation/db_api/
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Hello,
I need all records of _Category_ that doesn't have _parent_:
In my model:
#
class Category(models.Model):
#... code here
parent = models.ForeignKey('self', blank=True, null=True,
related_name='child_set')
##
all_categorys =
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