Django throws an error: LookupError: No installed app with label 'admin'

Using Django Mystery Errors
1

Today after installing django-cryptography for encrypting all fields in my models using this website, this error is keep showing on my terminal after running python manage.py runserver:

  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\core\checks\urls.py", line 24, in check_resolver
    return check_method()
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\urls\resolvers.py", line 494, in check
    for pattern in self.url_patterns:
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\utils\functional.py", line 57, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\urls\resolvers.py", line 715, in url_patterns
    patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\utils\functional.py", line 57, in __get__
    res = instance.__dict__[self.name] = self.func(instance)
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\urls\resolvers.py", line 708, in urlconf_module
    return import_module(self.urlconf_name)
  File "C:\Users\ADAMUDEE\AppData\Local\Programs\Python\Python310\lib\importlib\__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "C:\Users\ADAMUDEE\Desktop\school\project\school\urls.py", line 23, in <module>
    path('admin/', admin.site.urls),
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\utils\functional.py", line 266, in inner
    self._setup()
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\contrib\admin\sites.py", line 595, in _setup
    AdminSiteClass = import_string(apps.get_app_config("admin").default_site)
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\apps\registry.py", line 165, in get_app_config
    raise LookupError(message)
LookupError: No installed app with label 'admin'.

I try to solve it using these answer in this question, but no one works, I also deleted sqlite in my project folder and run migrate and makemigrations again, but it does not work, is there anyone who can help please?

my settings.py:

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'whitenoise.runserver_nostatic',
    'myschool',
    'crispy_forms',
    'crispy_bootstrap5',
    'bootstrap5',
    'materializecssform',
    'django_countries',
    'jsignature',
    "phonenumber_field",
]

my models:

class PrimaryAlbum(models.Model):
    name = encrypt(models.CharField(max_length=100))
    user = models.ForeignKey(User,
    on_delete=models.CASCADE)

    slug = models.SlugField(unique=True, max_length=100)


    def save(self, *args, **kwargs):
        self.slug = slugify(self.name)
        super().save(*args, **kwargs)
    

    def __str__(self):
        return self.name
2

The first line of code in the traceback that refers back to your code is this:

While this generally implies that there is something wrong in your urls.py file, it might not be directly related to this line.

What does your complete urls.py file look like?

3

This is my urls.py file:

"""school URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/4.0/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from os import name
from django.contrib import admin
from django.urls import path, include
from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('myschool.urls')),
]

urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
4 
"""school URL Configuration

The `urlpatterns` list routes URLs to views. For more information please see:
    https://docs.djangoproject.com/en/4.0/topics/http/urls/
Examples:
Function views
    1. Add an import:  from my_app import views
    2. Add a URL to urlpatterns:  path('', views.home, name='home')
Class-based views
    1. Add an import:  from other_app.views import Home
    2. Add a URL to urlpatterns:  path('', Home.as_view(), name='home')
Including another URLconf
    1. Import the include() function: from django.urls import include, path
    2. Add a URL to urlpatterns:  path('blog/', include('blog.urls'))
"""
from os import name
from django.contrib import admin
from django.urls import path, include
from django.conf import settings
from django.conf.urls.static import static

urlpatterns = [
    path('admin/', admin.site.urls),
    path('', include('myschool.urls')),
]

urlpatterns += static(settings.MEDIA_URL, document_root=settings.MEDIA_ROOT)
5

What versions of Django, Python, and django-cryptography are you using?

6

I’m using django= 4.1.5 and python= 3.10.0

7

And is the version of django-cryptography you are using compatible with that combination?

See: Installation — Django Cryptography 1.1.dev20200210060112 documentation

8

After deleted my virtual environment and run: runserver again, the error keep showing on my terminal sir

9

Did you change the versions of Python and Django that you are running to versions that are compatible with Django-cryptography?

10

No i deleted django-cryptography in models.py file and remove everything from fields and create a new virtual environment and install django again.

11

If you’re still getting an error, please post the full traceback that you are currently getting.

12

The error:

    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 883, in exec_module
  File "<frozen importlib._bootstrap>", line 241, in _call_with_frames_removed
  File "C:\Users\ADAMUDEE\Desktop\school\project\school\urls.py", line 23, in <module>
    path('admin/', admin.site.urls),
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\utils\functional.py", line 266, in inner
    self._setup()
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\contrib\admin\sites.py", line 595, in _setup
    AdminSiteClass = import_string(apps.get_app_config("admin").default_site)
  File "C:\Users\ADAMUDEE\Desktop\school\myv\lib\site-packages\django\apps\registry.py", line 165, in get_app_config
    raise LookupError(message)
LookupError: No installed app with label 'admin'.
13

So now it gets a little tougher.

First, can you do a makemigrations and migrate?

If those don’t work, a check might help.

Beyond that, finding the source of the problem from this point will require examining pretty much everything in your code to ensure that you don’t have a syntax error or an improper reference to a package or something similar to that.

14

You are great sir, You are my guru, You are my pride. because I added: import django and django.setup() in the settings.py file, just to solve that problem, that is why it keeping showing that error. Thanks

15

But what if i want to encrypt my django fields, I’m working in a big project that required that sir.

16

You’ve got the same options you would always have when encountering situations like this.

  • Verify that the original problem was caused by a version incompatibility issue.

    • There’s always the chance that the issue you were seeing was the result of something else wrong, and was just revealed by that package.

  • Find an alternative package.

    • There’s always the possibility of finding a public fork that someone else has created to do what you need it to do.

    • Implement it within the database itself

  • Fix it so that it’s compatible with the versions of Python and Django you are using,

    • Hire someone to fix it for you

  • Go back to an older version of Python / Django until the package has been updated. (Which could be “never”.)

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