Using Python to get the child __class__ not the base class

Question

I want to get the class of the sender in the code below using sender.__class__ . This works until I have a model that inherits from a base class.

For example sender is class Profile but sender.__class__ gives the base bass Profile inherits from MPTTModelBase (which is abstract = True ). Same thing with .Meta etc.

@receiver(post_save)
def send_func(sender, instance, created, **kwargs):

    print(sender) #<class 'demo.apps.t.models.Profile'>
    print(sender.__class__) # <class 'mptt.models.MPTTModelBase'>

How do I get the class ignoring inherited models (if it has one)?

Answer 1

For most django signals, the sender of the signal is the class itself. Here, you get sender as the class and the actual object is instance .

So what you will get is:

• sender.__class__ : the metaclass of your model.
• sender._meta : the model's Meta options. You get it here because Django removes the Meta from the model and makes options available as _meta , which it augments with some methods.