how can I reference a field from one model to another model

Hello, 

I do not know if I'm asking the question correctly, but I need to call a field of one model in another model

example:

class ModelDad(models.Model):

    name = blablabla

class ModelChild1(....):

   fk(ModelDad)

   number = models.IntegerField()

class ModelChild2(....):

  fk(ModelDad)

  another_number = models.IntegerField()

   def make_proces(self):

      return self.another_number * ModelChild1.number #this is my question

how can I send a call number within the function (make_proces ) of ModelChild2

is posible????

--

att.

Carlos Rocha

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