update() produces extra query with proxy model

[Yan Mitrofanov]

Assume we have these models:

class Chef(models.Model):
    name = models.CharField(max_length=50)

    class Meta:
        db_table = "chef"


class ProxyChef(Chef):

    class Meta:
        proxy = True

If we execute update query on proxy

ProxyChef.objects.filter(id=1).update(name='William')

We get two queries

SELECT "chef"."id" FROM "chef" WHERE "chef"."id" = 1
UPDATE "chef" SET "name" = 'William' WHERE "chef"."id" IN (1)

The first one is totally unnecessary.

[Tim Graham]

​PR

[Tim Graham <timograham@…>]

In 54e5c4a0:

Fixed #28820 -- Eliminated an extra query with QuerySet.update() on proxy models.