on_delete=CASCADE for related objects causing a `Matching query does not exist error`

[Kop3sh]

Steps

1. What version of Python and Django are you using?

   python --version
   Python 3.10.14
   django-admin --version
   4.2.3

2. What operating system and processor architecture are you using? using docker image python:3.10-slim-bullseye

3. What did you do? db schema is the following: user model has several related objects (in their str methods reference the user self.user)

e.g.

class User():
   # pass

class Item():
   name = ...
   user = models.OneToOneField('User', related_name="item", on_delete=models.CASCADE,null=True,blank=True)

   def __str__():
      return f'{self.name} for {self.user}'

• when I try to delete the user model from either the admin panel or the API endpoint

4. What did you expect to see?

   • the Item object DELETE Operation is logged and the object is deleted
   • User delete DELETE Operation is not logged although the object itself is deleted

5. What did you see instead?

• it throws Matching Query Does not exist Exception
• the Item object DELETE Operation is logged and the object is deleted
• User delete DELETE Operation is not logged although the object itself is deleted

Debugging

After debugging I found that the issue results from the pre/post delete signals for the Item object when trying to write CRUD logs for the delete operations (tried to remove easy audit and remove the str method and it worked)