Hi, first of all, this question maybe don't belongs here, i konw, but
anyway i didn't found noting about it in docs, and also in the source,
and 2 hours spend on it sisn't bring anything. So i had decided to ask
here

explanation, i have:

class A(models.Model):
    name = models.CharFiled(...., required=True)
    .....
class B(A):
    ....

I have an existing instance of A, say `a` and i "want to make"
instance of b out of it.

i'm looking for something like:
    b = B()
    b.origin = a
    b.save()

Is this somehow possible? Forcing a foreign key doesn't work - because
of the validation of required field in model A.

Thanks a lot!

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