[Python] DRF getting AttributeError while trying to post data

I'm creating a user registration API in DRF using a Profile model with a OneToOne relationship with Django's default User Model. I have created a serializer with User model and defined the fields of Profile as serializer fields.

The problem is when I post the data, though the user and profile are saved in the database I'm getting this error


error AttributeError at /auth/registration Got AttributeError when attempting to get a value for field address on serializer UserRegistrationSerializer. 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 'address'.


using write_only with address seems to solve the problem but I want to understand why is this happening and how this view accessing this address field why it ignores the phone_number and date_of_birth and doesn't give me errors on those. Any input will be helpful. Thanks!

Here is my code.

models.py


class Profile(models.Model):
user = models.OneToOneField(User, on_delete=models.CASCADE)
date_of_birth = models.DateField(null=True)
phone_number = models.CharField(null=True, max_length=30)
address = models.CharField(max_length=250)

def __str__(self):
return f'Profile of {self.user.username}'

Serializer.py


class UserRegistrationSerializer(serializers.ModelSerializer):
phone_number = serializers.CharField(required=False, max_length=30)
date_of_birth = serializers.DateField(required=False)
address = serializers.CharField(max_length=250)

password = serializers.CharField(write_only=True)
password2 = serializers.CharField(write_only=True, label = 'Confirm Password')
class Meta:
model = User
fields = ['username', 'first_name', 'last_name', 'email', 'phone_number', 'date_of_birth', 'address', 'password', 'password2']

def create(self, validated_data):
phone_number = validated_data.pop('phone_number', None)
date_of_birth = validated_data.pop('date_of_birth', None)
address = validated_data.pop('address', None)
password = validated_data.pop('password', None)
first_name = validated_data.pop('first_name', None)
last_name = validated_data.pop('last_name', None)

user = User (
username = validated_data['username'],
email = validated_data['email'],
first_name = first_name,
last_name = last_name
)

user.set_password(password)
user.save()

Profile.objects.create(
user=user,
date_of_birth=date_of_birth,
address=address,
phone_number=phone_number
)

return user

view.py


class UserRegistrationView(generics.CreateAPIView):
serializer_class = UserRegistrationSerializer
queryset = User.objects.all()

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