Django Annotate F Expression Zeros

expected.sql

SELECT
    0 AS "zero_sum",
    (0 + COUNT("pizza"."id"))
FROM "pizza"

zero_sum  | complex_sum
--------- | -----------
       0  |         100

models.py

from django.db import models

# The exact model seems unimportant here, I'll mosly be counting and filtering by id
class Pizza(models.Model):
    name = models.CharField(max_length=60)
    price = models.models.DecimalField(decimal_places=2, max_digits=7)
    description = models.TextField(null=True)

output.sql

SELECT
    0 AS "zero_sum",
    0 AS "complex_sum"   -- Short circuit to 0!
FROM "pizza"


zero_sum  | complex_sum
--------- | -----------
       0  |           0

query.py

from django.db.models import Q, F, Count

from models import Pizza


# This might come from a request for example, and could have values
# But here I'm interested in the empty case
list_of_ids = []

q = Pizza.objects.annotate(
    zero_sum=Count('id', filter=Q(id__in=list_of_ids)),
    complex_sum=F('zero_sum') + Count('id'),
)

print(q.query)