Poor man's model inheritance question.

Hi,

I am using OneToOneField to simulate model inheritance. I
have all the
shared fields in a base model, and then for every specific
case I have
a derived model that has a OneToOneField to that base model.
That was
all working fine.

Recently I was trying to encapsulate some of the
functionality that is
in all the derived models into a base class. So I have
something
similar to the following:

---------------
class Base(models.Model):
   common_field = models.CharField()

class CommonFunc(models.Model):
   def save(self):
      do_common_thing()
      super(CommonFunc,self).save()

class DerivedModel(CommonFunc):
   base = models.OneToOneField(Base)
   specific_field = models.CharField()
---------------

The problem I am having is that for some reason it is not
detecting
that the one-to-one field is a primary key and when I syncdb
it gives
me an error that DerivedModel has two primary keys since
django adds
the implicit id field.

Is this a bug? Is there a better way for me to achieve this?
Or should
I just wait patiently until model inheritance is
implemented?

-- 
Thanks,
Medhat


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