When trying to access objects through the related manager there are N extra queries that are performed that are unnecessary.
The problem is at __setattr__, specifically at is_val_equal_to_tenant (code).
The problen is that when we try to check the equality of val and self.tenant_object we perform another DB call to fetch the tenant.
reproduce:
from django_multitenant.tests.base import BaseTestCase
from django_multitenant.tests.models import Project
class RelatedMangerTestCase(BaseTestCase):
def test(self):
account = self.account_fr
_proj_1 = Project.objects.create(name="project_1", account=account)
_proj_2 = Project.objects.create(name="project_2", account=account)
with self.assertNumQueries(1):
# This will fail, the actual amount of queries is 3
# 1 for the SELECT query to get the projects
# and then 2 more queries to fetch the tenant 1 for each project
list(account.projects.all())
First expected query
```sql
SELECT
"tests_project"."id",
"tests_project"."name",
"tests_project"."account_id",
"tests_project"."employee_id"
FROM
"tests_project"
WHERE
"tests_project"."account_id" = 1
```
Extra queries
This query will be executed once for each related object (in this case 2 times) so when we have N related objects we will result in N extra queries.
```sql
SELECT
"tests_account"."id",
"tests_account"."name",
"tests_account"."domain",
"tests_account"."subdomain",
"tests_account"."country_id",
"tests_account"."employee_id"
FROM
"tests_account"
WHERE
"tests_account"."id" = 1
LIMIT
21
```
When trying to access objects through the related manager there are N extra queries that are performed that are unnecessary. The problem is at
__setattr__, specifically atis_val_equal_to_tenant(code). The problen is that when we try to check the equality ofvalandself.tenant_objectwe perform another DB call to fetch the tenant.reproduce:
First expected query
```sql SELECT "tests_project"."id", "tests_project"."name", "tests_project"."account_id", "tests_project"."employee_id" FROM "tests_project" WHERE "tests_project"."account_id" = 1 ```Extra queries
This query will be executed once for each related object (in this case 2 times) so when we have N related objects we will result in N extra queries. ```sql SELECT "tests_account"."id", "tests_account"."name", "tests_account"."domain", "tests_account"."subdomain", "tests_account"."country_id", "tests_account"."employee_id" FROM "tests_account" WHERE "tests_account"."id" = 1 LIMIT 21 ```