django model save method override manytomanyfield

The solution for this is noted below

django model save method override manytomanyfield

Solution

django does not get the m2mfield in save() method.
instead use signal(m2m_changed)

from django.db.models.signals import m2m_changed

class Topping(models.Model):
    # ...
    pass

class Pizza(models.Model):
    # ...
    toppings = models.ManyToManyField(Topping)

def toppings_changed(sender, **kwargs):
    # Do something
    pass

m2m_changed.connect(toppings_changed, sender=Pizza.toppings.through)

Try other methods by searching on the site. That is if this doesn’t work