User object has no attribute 'code', when code is not passed to User.objects.create

Question

Im using Django Rest Framework to create a view that verifies an otp. Currently, it works just fine.
models.py

class User(AbstractUser):
    phone_number = PhoneNumberField(blank=True)
    def __str__(self) -> str:
        return f"{self.username}"

views.py

class VerifyOTPCode(APIView):
    
    permission_classes=[AllowAny]
    
    def post(self, request):
        
        serializer = UserOTPCodeSerializer(data=request.data)
        
        if serializer.is_valid():
            user = serializer.save()
            return Response(serializer.validated_data, status=status.HTTP_201_CREATED)
        return Response(serializer.errors)

serializers.py

class UserOTPCodeSerializer(serializers.ModelSerializer):
    
    code = serializers.IntegerField()
    class Meta:
        model = User
        fields = ("first_name", "last_name", "email", "phone_number", "code")
    
    def validate(self, data):
        
        code, phone_number = str(data['code']), data['phone_number']
        
        if is_six_digits(code) and is_otp_approved(code, phone_number):
            return data
        
        raise serializers.ValidationError('Code was not approved')

    def create(self, validated_data):
        del validated_data['code']
        return User.objects.create(**validated_data)

However, I want to use a generic for the view instead, so I tried refactoring it into the following

views.py

class VerifyOTPCode(generics.CreateAPIView):
    
    permission_classes= [AllowAny]
    
    serializer_class= UserOTPCodeSerializer

Now, when I try to hit the endpoint, I get an error at create, that the User object has no attribute code, even though create removes code from validated_data, and another thing is that even with the error, a User object still does get created. Why is this error occurring and how can I fix it?

Internal Server Error: /user/register/verify-otp/
Traceback (most recent call last):
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkfields.py", line 457, in get_attribute
    return get_attribute(instance, self.source_attrs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkfields.py", line 97, in get_attribute
    instance = getattr(instance, attr)
AttributeError: 'User' object has no attribute 'code'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesdjangocorehandlersexception.py", line 47, in inner
    response = get_response(request)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesdjangocorehandlersbase.py", 
line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesdjangoviewsdecoratorscsrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesdjangoviewsgenericbase.py", 
line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkviews.py", line 
509, in dispatch
    response = self.handle_exception(exc)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkviews.py", line 
469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkviews.py", line 
480, in raise_uncaught_exception
    raise exc
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkviews.py", line 
506, in dispatch
    response = handler(request, *args, **kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkgenerics.py", line 190, in post
    return self.create(request, *args, **kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkmixins.py", line 20, in create
    headers = self.get_success_headers(serializer.data)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkserializers.py", line 555, in data
    ret = super().data
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkserializers.py", line 253, in data
    self._data = self.to_representation(self.instance)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkserializers.py", line 509, in to_representation
    attribute = field.get_attribute(instance)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkfields.py", line 490, in get_attribute
    raise type(exc)(msg)
AttributeError: Got AttributeError when attempting to get a value for field `code` on serializer `UserOTPCodeSerializer`.
The serializer field might be named incorrectly and not match any attribute or key on the `User` instance.      
Original exception text was: 'User' object has no attribute 'code'.
Internal Server Error: /user/register/verify-otp/
Traceback (most recent call last):
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkfields.py", line 457, in get_attribute
    return get_attribute(instance, self.source_attrs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkfields.py", line 97, in get_attribute
    instance = getattr(instance, attr)
AttributeError: 'User' object has no attribute 'code'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesdjangocorehandlersexception.py", line 47, in inner
    response = get_response(request)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesdjangocorehandlersbase.py", 
line 181, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesdjangoviewsdecoratorscsrf.py", line 54, in wrapped_view
    return view_func(*args, **kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesdjangoviewsgenericbase.py", 
line 70, in view
    return self.dispatch(request, *args, **kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkviews.py", line 
509, in dispatch
    response = self.handle_exception(exc)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkviews.py", line 
469, in handle_exception
    self.raise_uncaught_exception(exc)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkviews.py", line 
480, in raise_uncaught_exception
    raise exc
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkviews.py", line 
506, in dispatch
    response = handler(request, *args, **kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkgenerics.py", line 190, in post
    return self.create(request, *args, **kwargs)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkmixins.py", line 20, in create
    headers = self.get_success_headers(serializer.data)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkserializers.py", line 555, in data
    ret = super().data
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkserializers.py", line 253, in data
    self._data = self.to_representation(self.instance)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkserializers.py", line 509, in to_representation
    attribute = field.get_attribute(instance)
  File "C:Users61403AppDataLocalProgramsPythonPython310libsite-packagesrest_frameworkfields.py", line 490, in get_attribute
    raise type(exc)(msg)
AttributeError: Got AttributeError when attempting to get a value for field `code` on serializer `UserOTPCodeSerializer`.
The serializer field might be named incorrectly and not match any attribute or key on the `User` instance.      
Original exception text was: 'User' object has no attribute 'code'.

Asked By: meg hidey

||

Source

Answer 1

You have to use write_only=True. Like this:

code = serializers.IntegerField(write_only=True)

Answered By: Ashraful Islam

User object has no attribute 'code', when code is not passed to User.objects.create

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