django Cannot set values on a ManyToManyField which specifies an intermediary model. Use Manager instead

Question

i am working on saving on the same form two tables - having a m2m relation. I don\'t succeed, my error persists with something like: Cannot set values on a ManyToManyField w

Answer 1

If you are allowed to modify class Membership, adding auto_created = True might solve your problem,

class Membership(models.Model): 
    class Meta:
        auto_created = True

In Django 1.7, the error message is changed to "Cannot set values on a ManyToManyField which specifies an intermediary model". The solution is the same.

NOTE: This will remove your intermediate model entirely, and all the additional fields with it.