Django Inheritance: How to get one method for all subclasses?

Question

I have a model

BaseModel

and several subclasses

ChildModelA(BaseModel), ChildModelB(BaseModel), ...

using multitask inheritance. In the future, I plan to have dozens of subclass models.

All subclasses have some method implementation.

do_something()

How can I call do_somthing from an instance of BaseModel?

An almost identical problem (without solution) is posted here:
http://peterbraden.co.uk/article/django-inheritance

A simpler question: how do I enable basModel instnace to one of its subclasses instances without checking all possible subclasses?

Answer 1

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def resolve(self):
    module, cls_name = self.class_name.rsplit(".",1)
    module = import_module(module)
    cls = getattr(module, cls_name)
    return cls.objects.get(pk=self.pk)

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Answer 2

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Answer 3

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, :

class Foo(models.Model, OurKitchenSinkClass):

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