One-to-one relationship not working as expected

[mtomiyoshi]

I'm having some weird behaviors when trying to use a one-to-one relationship and I'm not sure if this is a bug or if I am doing something wrong.

Let's say I have the following models:

class Tenant(AbstractTenant):
    name = models.CharField(max_length=50)

    def natural_key(self):
        return (self.name, )


class A(TenantModel):
    name = models.CharField(max_length=30)


class B(TenantModel):
    main = models.OneToOneField(A)

    name = models.CharField(max_length=40)

And I try to run the following on the django shell:

from core.models import Tenant, A, B

t, _ = Tenant.objects.get_or_create(name='tenant1')

a_model = A.for_tenant(t)
a_model.objects.filter(b__name='test')

Then I get an exception: django.core.exceptions.FieldError: Cannot resolve keyword 'b' into field. Choices are: id, name

If I try to access this reverse relationship directly through an instance of A with something like a_model.objects.first().b, then I get this exception: django.db.utils.ProgrammingError: relation "core_b" does not exist LINE 1: ...b"."id", "core_b"."main_id", "core_b"."name" FROM "core_b" W...

But if I simply access the tenant model for B in this shell session with b_model = B.for_tenant(t) then things start behaving differently:

Running a_model.objects.filter(b__name='test') now gets me django.core.exceptions.FieldError: Cannot resolve keyword 'b' into field. Choices are: b_set, id, name, which says to me that there is now a b_set relationship (but I think it should be named b only, since this is an OneToOneField) and I can filter it with no errors with a_model.objects.filter(b_set__name='test'). It should be noted that before accessing the B tenant model the same command does not work at all.

Other similar strange behaviors happen when I try to access b_set on an A instance before running B.for_tenant(t).

It seems that this affects ForeignKey fields also, but I just looked briefly at it.

Am I missing something? I am using Django 1.10.2, by the way.

Thanks!