title: Filling model with 2 foreign keys on Django
body: <p>Good evening fellows and happy workers day. I have this task, that is, filling an intermediate model with two foreign keys from two other models.</p>
  
  <pre><code>Class A:
      string_attr = models.CharField()
      string_attr_2 = models.CharField()
  
  Class B:
      string_attr_x = models.CharField()
      string_attr_y = models.CharField()
  
  Class C:
      date_attr = models.DateField()
      a = models.ForeignKey(A)
      b = models.ForeignKey(B)
  </code></pre>
  
  <p>The task is given a object from Model A, create as many objects that the table from class B has on model C. That is, given that class B has 4 objects and with the object X from class A, create 4 objects on table C.</p>
  
  <p>Class A is a Pacients Model and class B is a Vital Signs and class C is PacientVitalSign model, for any given Pacient, I want to show a Formset or anything like it, with every vital sign to set on the PacientVitalSign model.</p>
  
  <p>I don't know if the point is clear enough, English is not my mother language. I've look django-extra-views to achieve this task but I haven't hit the right key.</p>
  
  <p>Any ideas?</p>
  
  <p>Thanks</p>