[Django] #33378: django.core.exceptions.ImproperlyConfigured Error when installing apps in subdirectory

[Django]

#33378: django.core.exceptions.ImproperlyConfigured Error when installing apps 
in
subdirectory
-------------------------------------+-------------------------------------
               Reporter:             |          Owner:  nobody
  alphazwest                         |
                   Type:  Bug        |         Status:  new
              Component:  Core       |        Version:  4.0
  (Other)                            |       Keywords:  Apps, Subdirectory,
               Severity:  Normal     |  Installation
           Triage Stage:             |      Has patch:  0
  Unreviewed                         |
    Needs documentation:  0          |    Needs tests:  0
Patch needs improvement:  0          |  Easy pickings:  0
                  UI/UX:  0          |
-------------------------------------+-------------------------------------
 4.0 Throws an exception when installing apps that are located in
 subdirectories.

 Example, for a project of such structure:


 {{{
 .
 └── DjangoProject/
     └── Apps/
         ├── bestapp/
         │   ├── migrations
         │   ├── __init__.py
         │   ├── admin.py
         │   ├── apps.py
         │   ├── models.py
         │   ├── tests.py
         │   └── views.py
         └── ...
 }}}

 When adding this line to DjangoProject/settings.py:


 {{{
 INSTALLED_APPS = [
     ...
     'Apps.bestapp.apps.BestappConfig'
 ]
 }}}

 The following exception is thrown when running {{{python manage.py
 makemigrations}}}:


 {{{
 django.core.exceptions.ImproperlyConfigured: Cannot import 'bestapp'.
 Check that 'Apps.bestapp.apps.BestappConfig.name' is correct.

 }}}

 The current workaround is to go into the Apps/bestapp/apps.py file and
 make the following change:


 Auto-generated version:
 {{{
 class BestappConfig(AppConfig):
     default_auto_field = 'django.db.models.BigAutoField'
     name = 'bestapp'
 }}}

 Manually-Updated version:
 {{{
 class BestappConfig(AppConfig):
     default_auto_field = 'django.db.models.BigAutoField'
     name = 'Apps.bestapp'
 }}}

 Note the change being adding the parent directory here: {{{name =
 'Apps.bestapp' }}}

 IIRC, there was a syntax change for app installation somewhere in 3.x. Not
 sure if this is a product of that change or something else.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/33378>
Django <https://code.djangoproject.com/>
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