[Django] #36793: Reversing RenameModel in an environment with pre-Django 6.0 permission records leaves wrong users & groups associated

[Django]

#36793: Reversing RenameModel in an environment with pre-Django 6.0 permission
records leaves wrong users & groups associated
-------------------------------------+-------------------------------------
Reporter: Jacob | Owner: Artyom Kotovskiy
Walls |
Type: Bug | Status: assigned
Component: | Version: 6.0
contrib.auth |
Severity: Release | Keywords:
blocker |
Triage Stage: | Has patch: 1
Unreviewed |
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 1 | Easy pickings: 0
UI/UX: 0 |
-------------------------------------+-------------------------------------
- Checkout Django 5.2
- Assign user 1 to have view permissions on `FooModel`
- Rename the model to `BarModel`
- Migrate
(Result: no permissions transfer to `BarModel`, `FooModel` permissions
left behind in the db).
- Assign user 2 to have view permissions on `BarModel`
- Checkout Django 6.0
- Rename the model back to `FooModel` and migrate forward

Expected: ?
What user should have view permissions on `FooModel` now, 1 or 2?

As of #27489, which makes the permissions tag along with `RenameModel`
operations, I think we would expect user 2. (Proposed fix PR makes it
Users 1 *and* 2, but I'm interested to hear more on that.)

Actual result: User 1 has the permission on FooModel, and BarModel
permissions for User 2 are left behind in the db.

Bug in f02b49d2f3bf84f5225de920ca510149f1f9f1da.
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Ticket URL: <https://code.djangoproject.com/ticket/36793>
Django <https://code.djangoproject.com/>
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[Django]

#36793: Reversing RenameModel in an environment with pre-Django 6.0 permission
records leaves wrong users & groups associated
-------------------------------------+-------------------------------------

Reporter: Jacob Walls | Owner: Artyom
| Kotovskiy
Type: Bug | Status: assigned
Component: contrib.auth | Version: 6.0
Severity: Release blocker | Resolution:
Keywords: | Triage Stage:
| Unreviewed
Has patch: 1 | Needs documentation: 0

Needs tests: 0 | Patch needs improvement: 1
Easy pickings: 0 | UI/UX: 0
-------------------------------------+-------------------------------------

Comment (by Jacob Walls):

[https://github.com/django/django/pull/20339 PR]
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Ticket URL: <https://code.djangoproject.com/ticket/36793#comment:1>