#32692: Django 3.2 automatic AppConfig discovery breaks projects working in
3.1.8
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Reporter: Manel Clos | Owner: nobody
Type: Bug | Status: new
Component: Core (Other) | Version: 3.2
Severity: Normal | Keywords:
Triage Stage: Unreviewed | Has patch: 0
Needs documentation: 0 | Needs tests: 0
Patch needs improvement: 0 | Easy pickings: 0
UI/UX: 0 |
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The described method of overriding the default admin site
(https://docs.djangoproject.com/en/3.2/ref/contrib/admin/#overriding-the-
default-admin-site), is not compatible with automatic AppConfig
discovery, if the app (myproject, or myapps) is already in INSTALLED_APPS.
**How to reproduce**
- `pip install Django==3.2`
- `django-admin startproject myproject`
- `python manage.py migrate`
- `python manage.py createsuperuser`
- Put a template in `myproject/templates/admin/base_site.html`
- Add `myproject` to `INSTALLED_APPS`
- `python manage.py runserver` works, I can access the admin site and see
the changes in templates
- Follow the guide to override the default admin site,
https://docs.djangoproject.com/en/3.2/ref/contrib/admin/#overriding-the-
default-admin-site, this is, create `myproject/admin.py`,
`myproject/apps.py` and modify `settings.py`.
- `python manage.py runserver`
**Actual result**
`RuntimeError: 'myproject.apps' declares more than one default AppConfig:
'AdminConfig', 'MyAdminConfig'.``
**This a regression**
- `pip install Django==3.1.8`
- `python manage.py runserver`
- All ok, both templates and AdminConfig working at the same time
**Workaroud**
- use `app-admin.py` instead of `apps.py` when following the documentation
to override the default admin site
- adjust settings.py: `'myproject.apps-admin.MyAdminConfig'` in
INSTALLED_APPS
- works with Django 3.2
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Ticket URL: <https://code.djangoproject.com/ticket/32692>
Django <https://code.djangoproject.com/>
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