Here's how I did it for a similar situation I had.
class MyCategory(models.Model):
category = models.CharField(maxlength=50)
parent_category = models.ForeignKey('self', blank=True,
null=True, related_name='sub_categories')
def all_items(self):
data = list(self.items.all())
for cat in self.sub_categories.all():
data.append(list(cat.all_items()))
return data
class MyItem(models.Model):
name = models.CharField(maxlength=100)
categories = models.ManyToManyField(MyCategory,
related_name='items')
This is not the most effecient way of doing things since the list
command forces the queryset to evaluate completely. Perhaps we should
consider adding a UNION function to combine QuerySets if it's not
already in there.
Andy
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