Django Model Restore: Soft Delete without surprises

This project aims to implement soft delete in Django without some of the surprises that come with other soft delete libraries. Namely it will not return soft deleted records from the db when querying on models related to the model of the soft deleted instance.

Example:

from django.db import models

class Owner(soft_delete_lib.Deletable):
    name = models.TextField()

class Poll(soft_delete_lib.Deletable):
    name = models.TextField()
    owner = models.ForeignKey(Owner)

def test_soft_delete():
    owner = Owner.objects.create(name='test')
    poll = Poll.objects.create(name='test', owner=owner)

    assert owner.polls.count() == 1

    poll.delete()

    # works with all soft delete libraries researched
    assert owner.polls.count() == 0

    # this is usually where soft delete libraries fail
    assert list(Owner.objects.values_list(poll__name=True, flat=True)) == [None]

What's happening here? Most soft delete libraries implement soft delete via a boolean or date flag (e.g. deleted/deleted_at). They reference this date flag to determine whether to return the result in the base_queryset for the manager of the soft deletable model. What they are not able to do, is have queries on the same SQL table via other django models respect the filter on the deleted field. That is the issue this library aims to solve