CurrentSiteManager returns objects of superclass for sub-models that do not define any additional fields

[dp@…]

Suppose I have two models, one inheriting the other:

class BaseModel(models.Model):
    title = models.CharField()
    # ...

    objects = models.Manager()
    on_site = CurrentSiteManager()

Then I create a subclass:

class SubModel(BaseModel):
    objects = models.Manager()
    on_site = CurrentSiteManager()

    # ...

Then calling SubModel.on_site.all() returns a QuerySet containing all instances of BaseModel on that site. Checking the SQL reveals that that no table join to the sub_model table occurs.

This can be worked around by instead calling SubModel.objects.filter(site=settings.SITE_ID), but I do believe this to be a bug.

[Tim Graham]

I don't think the use case (subclassing without any additional fields) is advisable without using ​proxy models -- if there are no fields on SubModel, then there's no reason to join the sub_model table. Please reopen this doesn't work for you.