Django LookupError: No installed app with label 'admin'

Question

I'm trying to running the appserver with python manage.py runserver with python 3.8.2 and django 3.0.3. I've setup a mysql database connection and inserted my "myApp.apps.myAppConfig" into INSTALLED_APPS, declared a couple of database-view based models, a form and a view. Nothing that seems too out of the way for the tutorials i've found. When i run the python manage.py runserver command, this is the output:

Watching for file changes with StatReloader Performing system checks...

Exception in thread django-main-thread: Traceback (most recent call last): File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\apps\registry.py", line 155, in get_app_config return self.app_configs[app_label] KeyError: 'admin'

During handling of the above exception, another exception occurred:

Traceback (most recent call last): File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\threading.py", line 932, in _bootstrap_inner self.run() File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\threading.py", line 870, in run self._target(*self._args, **self._kwargs) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\autoreload.py", line 53, in wrapper fn(*args, **kwargs) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\management\commands\runserver.py", line 117, in inner_run self.check(display_num_errors=True) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\management\base.py", line 392, in check all_issues = self._run_checks( File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\management\base.py", line 382, in _run_checks return checks.run_checks(**kwargs) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\checks\registry.py", line 72, in run_checks new_errors = check(app_configs=app_configs) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\checks\urls.py", line 13, in check_url_config return check_resolver(resolver) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\core\checks\urls.py", line 23, in check_resolver return check_method() File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\urls\resolvers.py", line 407, in check for pattern in self.url_patterns: File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\functional.py", line 48, in get res = instance.dict[self.name] = self.func(instance) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\urls\resolvers.py", line 588, in url_patterns patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\functional.py", line 48, in get res = instance.dict[self.name] = self.func(instance) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\urls\resolvers.py", line 581, in urlconf_module return import_module(self.urlconf_name) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\importlib__init__.py", line 127, in import_module return _bootstrap._gcd_import(name[level:], package, level) File "", line 1014, in _gcd_import File "", line 991, in _find_and_load File "", line 975, in _find_and_load_unlocked File "", line 671, in _load_unlocked
File "", line 783, in exec_module File "", line 219, in _call_with_frames_removed File "C:\Users\celli\Desktop\Interventi Comuni\Python\django-projects\zabbixPyFace\zabbixPyFace\urls.py", line 21, in path('admin/', admin.site.urls), File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\utils\functional.py", line 224, in inner self._setup() File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\contrib\admin\sites.py", line 537, in _setup AdminSiteClass = import_string(apps.get_app_config('admin').default_site) File "C:\Users\celli\AppData\Local\Programs\Python\Python38\lib\site-packages\django\apps\registry.py", line 162, in get_app_config raise LookupError(message) LookupError: No installed app with label 'admin'.

I tried searching big G for answers but there's many sources that can cause this problem, could any of you gurus provide some insight?

Update:

I've already checked the INSTALLED_APPS and django.contrib.admin is present:

INSTALLED_APPS = [ 'django.contrib.admin', 'django.contrib.auth', 'django.contrib.contenttypes', 'django.contrib.sessions', 'django.contrib.messages', 'django.contrib.staticfiles', # jupyter notebook plugin 'django_extensions', ]

Nitesh Babu Nitesh Babu · Accepted Answer · 2020-07-18T16:14:17

I had to face the same situation, was running it in a virtual environment so there was no case of any package dependencies error. I tried to debug it in all possible ways, like checking my 'settings.py' file, 'urls.py' & many more but wasn't successful. So a day full of debugging & troubleshooting, I was about to restart my project & then I came to 'models.py' & there was this error:

class Tweet(models.Model):
content = models.TextField(blank=True, null=True)
image = models.FileField(blank=True, null=True)

def __str__(self):
    return self.content

def serialize(self):
    return {
        "id" : self.id,
        "content" : self.content #missin comma
        "likes" : random.randint(0,400),
    }

See I just forgot to comma here & it didn't show me the exact syntax error, instead it showed me some other that wasn't even related to it

PS : Check out for any syntax error in the 'models.py' or other file if you're using one.

Django LookupError: No installed app with label 'admin'

3 Answers