Django update queryset with annotation

Question

I want to update all rows in queryset by using annotated value.

I have a simple models:

class Relation(models.Model):
    rating = models.IntegerFiel         


        

Answer 1

If you want to avoid many calls to the database, you should use transaction.atomic.

Read more on Django documentation: https://docs.djangoproject.com/en/1.9/topics/db/transactions/#controlling-transactions-explicitly