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I have a following model and abstract base class import abc from django.db import models class AbstractBase(): __metaclass__ = abc.ABCMeta @abc.abstractmethod def my_method(self): return class MyModel(models.Model, AbstractBase): @abc.abstractmethod def my_method(self): return 1 But I am getting the following error. metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases I think the problem here is (As it is described here http://code.activestate.com/recipes/204197-solving-the-metaclass-conflict/ ) that two base class has two different metaclasses so python cannot decide which metaclass to use for child object. In order to solve this I removed multiple inheritence and use following register method to register child class abc.register(Child) But I did not really like this approach since it looks like monkey patching. Is there another way to solve this problem? I try to assign Model metaclass to Child explicitly but it did not work. I am not looking for a way to solve it by writing code. I think this must be solved by changing my class structure.

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