I was using django user class and rest_framework Token class to store the user info and the token. For the same I was using serializers.ModelSerializer
class. But when I am making update request(check update method) to update the user info as well as the token that I have, its giving me error.
Here is serializers.py
from rest_framework import serializers
from django.contrib.auth.models import User
from rest_framework.authtoken.views import Token
class UserSerializer(serializers.ModelSerializer):
class Meta:
model = User
fields = ['id', 'username', 'password']
extra_kwargs = {
'password' : {
'write_only':True,
'required': True
}
}
def create(self, validated_data):
user = User.objects.create_user(**validated_data)
Token.objects.create(user=user) # create token for the user
return user
def update(self, instance, validated_data):
instance.username = validated_data['username']
instance.set_password(validated_data['password'])
instance.save()
Token.objects.update(user=instance)
return instance
views.py
class UserViewSet(viewsets.ModelViewSet):
queryset = User.objects.all()
serializer_class = UserSerializer
permission_classes = [IsAuthenticated, IsOwnerOfObject]
authentication_classes = (TokenAuthentication,)
urls.py
from django.urls import path, include
from rest_framework.routers import DefaultRouter
router = DefaultRouter()
router.register('users', UserViewSet, basename = 'users')
urlpatterns = [
path('api/', include(router.urls)),
]
Error :
django.db.utils.IntegrityError: UNIQUE constraint failed: authtoken_token.user_id
This is how I am making the request with the authorisation token in the header field:
This line is invalid:
Token.objects.update(user=instance)
Here, you are trying to update a Token object without specifying which one. You should do .filter()
or .get()
before updating.
But that statement is reduntant. Think about it, you're updating the token from 'instance' to 'instance'. So, everything will be the same. Try deleting it as it doesn't have any effect.