Getting a subclass from an abstract Model

Hello everyone,

my models are defined like this:

class MyBaseModel(models.Model):
.....
class Meta:
abstract = True

class ClassA(MyBaseModel):
......

class ClassB(MyBaseModel):
......

Then I'm trying to get a subclass of MyBaseModel by doing this:

for s in MyBaseModel.__subclasses__():
if s.__name__ == "ClassA":
MyClass = s
elif s.__name__ == "ClassB":
MyClass = s
q = MyClass.objects.all() ===> Raise an AttributeError: type object
'ClassA' has no attribute '_default_manager'

I don't understand why it raises this error, what am I missing?

Thank you very much for your help.

Cheers,

Gontran

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