Tahmid Khan Nafee Tahmid Khan Nafee - 3 months ago 73
AngularJS Question

RuntimeError: Model class django.contrib.sites.models.Site doesn't declare an explicit app_label and isn't in an application in INSTALLED_APPS

I am building an application with Django Rest Framework and AngularJs. I am using Django-rest-auth for my authentication purposes, although, I have not been able to set it up. Anyway, I am trying to set up this app with my project. I realized I need to install django-rest-auth-registration to get it running, so I followed this documentation to do the following things:

I ran the commands


pip install django-rest-auth


and


pip install django-allauth


Any my settings.py looks like this:

INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',

# 3rd party apps
'rest_framework',
'rest_framework.authtoken',
'rest_auth',
'allauth',
'allauth.account',
'rest_auth.registration',

# My app
'myapp',
]


I have also added the authentication backends, context_processors, and the proper urls.

However, when I try to migrate, my terminal throws the following error:


RuntimeError: Model class django.contrib.sites.models.Site doesn't
declare an explicit app_label and isn't in an application in
INSTALLED_APPS.


Why do I get this error, and how do I solve it to migrate my project? Thanks!

Answer

The fix

Just add Django's Sites framework to your apps and set SITE_ID to 1 in your settings.

INSTALLED_APPS = [
    ...
    'django.contrib.sites',
]

SITE_ID = 1

Why does this happen?

Django's Sites Framework is a contributed module bundled with the core library that allows for the use of a single Django application/codebase with different sites (that can use different databases, logic in views, etc). The SITE_ID setting, as stated in the docs, "is used so that application data can hook into specific sites and a single database can manage content for multiple sites."

In this particular case AllAuth requires the Sites Framework in order to function properly. Many other third-party libraries are built to safely handle cases where multiple sites may be present and as such may be best .

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