André,
I'm assuming that you are using the Trunk version of Django because
subclassing isn't supported in previous versions.
Assuming that.
You can either have Item be an Abstract class which does not act like
a table but just a parent class containing common items. (this is not
what you are trying...)
Or
Each sub class is a seperate model from Item (assuming this is what
you want). From the documentation you should be able to do the
following:
items = Item.objects.all()
for item in items:
try:
x = Item.task
type = "Task"
except:
try:
x = Item.event
type = "Event"
except:
type = "Item"
Do something pertaining to the item type....
I haven't tried this but according to the docs it should work.... You
should also fill in the correct exception. I just don't know what it
is.
Hope it helps.
Dave.
On Jul 8, 2:12 am, "Andre Meyer" <[EMAIL PROTECTED]> wrote:
> hi all
>
> is it possible to determine the subclass of a model instance?
>
> what i mean is this:
> if you have a (n abstract) model class and two subclasses, like
>
> class Item(models.Model):
> pass
>
> class Task(Item):
> pass
>
> class Event(Item):
> pass
>
> and you retrieve
>
> items = Item.objects.all()
>
> how can you know whether the items are either tasks or events?
>
> items[0].__class__ returns just <class 'proj.app.models.Item'>.
>
> thanks for sharing your insights
> regards
> André
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