How to correctly use auto_created attribute in django?

Question

I need to create my own intermediate model.

class class1(models.Model):
    pass

class class2(models.Model):
    field1 = models.ManyToManyField(class1, through=         


        

Answer 1

As far as I am aware, the auto_created attribute in the Meta class is undocumented, so you should avoid using it.

As the AttributeError says, it is not possible to use add() for a many to many field that uses an intermediary model. The correct fix is to create an instance of the intermediate model, instead of using add().

class3.objects.create(field_1=c1, field_2=c2, field_3=1).

See the docs on extra fields in many to many relationships for more info.