This is an attempt at fixing AppRegistryNotReady

rest_framework_simplejwt/authentication.py

@@ -1,10 +1,10 @@
+from django.contrib.auth import get_user_model
 from django.utils.translation import ugettext_lazy as _
 from rest_framework import HTTP_HEADER_ENCODING, authentication
 
 from .exceptions import AuthenticationFailed, InvalidToken, TokenError
 from .models import TokenUser
 from .settings import api_settings
-from .state import User
 
 AUTH_HEADER_TYPES = api_settings.AUTH_HEADER_TYPES
 
@@ -24,6 +24,9 @@ class JWTAuthentication(authentication.BaseAuthentication):
     """
     www_authenticate_realm = 'api'
 
+    def __init__(self):
+        self.user_model = get_user_model()
+
     def authenticate(self, request):
         header = self.get_header(request)
         if header is None:
@@ -108,8 +111,8 @@ def get_user(self, validated_token):
             raise InvalidToken(_('Token contained no recognizable user identification'))
 
         try:
-            user = User.objects.get(**{api_settings.USER_ID_FIELD: user_id})
-        except User.DoesNotExist:
+            user = self.user_model.objects.get(**{api_settings.USER_ID_FIELD: user_id})
+        except self.user_model.DoesNotExist:
             raise AuthenticationFailed(_('User not found'), code='user_not_found')
 
         if not user.is_active:

rest_framework_simplejwt/models.py

@@ -1,4 +1,3 @@
-from django.contrib.auth import models as auth_models
 from django.db.models.manager import EmptyManager
 from django.utils.functional import cached_property
 
@@ -19,11 +18,13 @@ class instead of a `User` model instance.  Instances of this class act as
     # inactive user
     is_active = True
 
-    _groups = EmptyManager(auth_models.Group)
-    _user_permissions = EmptyManager(auth_models.Permission)
 
     def __init__(self, token):
         self.token = token
+        from django.contrib.auth import models as auth_models
+        self._groups = EmptyManager(auth_models.Group)
+        self._user_permissions = EmptyManager(auth_models.Permission)
+
 
     def __str__(self):
         return 'TokenUser {}'.format(self.id)

rest_framework_simplejwt/serializers.py

@@ -1,9 +1,9 @@
+from django.contrib.auth import get_user_model
 from django.contrib.auth import authenticate
 from django.utils.translation import ugettext_lazy as _
 from rest_framework import exceptions, serializers
 
 from .settings import api_settings
-from .state import User
 from .tokens import RefreshToken, SlidingToken, UntypedToken
 
 
@@ -18,7 +18,9 @@ def __init__(self, *args, **kwargs):
 
 
 class TokenObtainSerializer(serializers.Serializer):
-    username_field = User.USERNAME_FIELD
+    user_model = get_user_model()
+
+    username_field = user_model.USERNAME_FIELD
 
     default_error_messages = {
         'no_active_account': _('No active account found with the given credentials')

rest_framework_simplejwt/state.py

@@ -3,6 +3,5 @@
 from .backends import TokenBackend
 from .settings import api_settings
 
-User = get_user_model()
 token_backend = TokenBackend(api_settings.ALGORITHM, api_settings.SIGNING_KEY,
                              api_settings.VERIFYING_KEY, api_settings.AUDIENCE, api_settings.ISSUER)