Distinguishing parent model's children with Django inheritance

Question

Basically I have a Base class called \"Program\". I then have more specific program model types that use Program as a base class. For 99% of my needs, I don\'t care whether or n

Answer 1

// Update

As pointed out in the comments to this post I got the question wrong. The answer below will not solve the problem.

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Hi f4nt,

the easiest way I can think of right now would be the following:

program = models.Program.objects.get(id=15)

if program.__class__.__name__ == 'ModelA':
  # to something

if program.__class__.__name__ == 'ModelB':
  # to something

To make this a bit better you could write a method in the base model:

class MyModel(models.Model):

  def instanceOfModel(self, model_name):
    return self.__class__.__name__ == model_name

That way the code from above would look like this:

program = models.Program.objects.get(id=15)

if program.instanceOfModel('ModelA'):
  # to something

if program.instanceOfModel('ModelB'):
  # to something

But as you can imagine this is ugly. You could look into the content type framework which might help you to do the same except more elegent.

Hope that helps!