Thank you Daniel (and James) for your prompt responses. At least now I
know I wasn't missing something obvious. Your comment about storing
the type in each object sparked an idea:
from django.contrib.contenttypes.models import ContentType # very
handy that Django stores this information...
#...
class Item(models.Model): #generic super class
# [other fields go here]
content_type = models.ForeignKey(ContentType) # each item should
store its own class/type
def save(self):
self.content_type = ContentType.objects.get_for_model(self) #
when a
decendant object is saved, this correctly stores the subclass type
super(Item,self).save()
def render(self):
subclass =
self.content_type.model_class().objects.get(item_ptr=self.id) # this
returns the object with the correct class/type
return subclass.render()
#Now if I say, for example:
for i in Item.objects.all():
i.render()
This works beautifully -- i.render() calls the render method of the
true subclass. Hopefully others might find this helpful also.
Thanks again for your help guys.
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