count values from manytomanyfield

Question

I am trying to count the distinct values from a group of objects that have a manytomanyfield

e.g.

object article has manytomanyfield of tag objects

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Answer 1

You question is related: How to count and display objects in relation ManyToMany in Django

models.py

class Topping(models.Model):
        name = models.CharField(max_length = 20)

class Pizza(models.Model):
        name = models.CharField(max_length = 20)
        toppings = models.ManyToManyField(Topping)

python manage.py shell

>>> for topping in Topping.objects.all():
...     print topping.name, topping.pizza_set.count()