Cant update multiple model data through one serializer.

Hi, I’m trying to build API for an application with DRF where there will be 2 user types.

I want to do the authentication with one User model and there will 2 different profile model each having it’s own unique properties.

class DoctorProfile(models.Model):
    """Model for Doctors profile"""
    class DoctorType(models.TextChoices):
        """Doctor will choose profession category from enum"""
        PSYCHIATRIST = "PSYCHIATRIST", "Psychiatrist"
        PSYCHOLOGIST = "PSYCHOLOGIST", "Psychologist"
        DERMATOLOGIST = "DERMATOLOGIST", "Dermatologist"
        SEXUAL_HEALTH = "SEXUAL HEALTH", "Sexual health"
        GYNECOLOGIST = "GYNECOLOGIST", "Gynecologist"
        INTERNAL_MEDICINE = "INTERNAL MEDICINE", "Internal medicine"

    owner = models.OneToOneField(
    doctor_type = models.CharField(
        _("Profession Type"), 
    title = models.IntegerField(_('Title'), default=1, choices=TITLES)
    date_of_birth = models.DateField(null=True, blank=False)
    gender = models.IntegerField(_('Gender'), default=1, choices=GENDERS)
    registration_number = models.IntegerField(_('Registration Number'), null=True, blank=False)
    city = models.CharField(_('City'), max_length=255, null=True, blank=True)
    country = models.CharField(_('Country'), max_length=255, null=True, blank=True)

    def __str__(self):
        return f'profile-{}-{self.title} {self.owner.get_full_name()}'

I want to show the information in Doctor Profile page combining both CustomUser and DoctorProfile model.

I wrote two serializers, one for getting all the properties of DoctorProfile model, and used that serializer in the main serializer DoctorProfileSeriaizer where I used the model serializer for CustomUser model and put the serializer mentioned above in a variable named profile. My objective here is to get all the properties from DoctorProfile model under profile key.

class DoctorProfileFields(serializers.ModelSerializer):
    """this will be used in DoctorProfileSerializer as profile key"""
    class Meta:
        model = DoctorProfile
        fields = ('doctor_type', 'title', 'date_of_birth', 'registration_number', 'gender', 'city', 'country', )
class DoctorProfileSerializer(serializers.ModelSerializer):
    """retrieve, update and delete profile"""

    profile = DoctorProfileFields(source='*')
    class Meta:
        model = User
        fields = ('name', 'avatar', 'profile', )
    def update(self, instance, validated_data):
        print("==============", validated_data)
        ModelClass = self.Meta.model
        profile = validated_data.pop('profile', {})

        if profile:
        new_instance = ModelClass.objects.get(id =
        return new_instance

Payload I’m trying to send :arrow_heading_down:

    "name": "Iron Man Updated",
    "profile" : {
        "doctor_type": "PSYCHIATRIST",
        "date_of_birth": "1995-01-01",
        "registration_number": 154878,
        "city": "NY",
        "country": "USA"

When I try sending request with GET method it returns in the expected nested format, but the problem is with the PUT method. it’s returning error saying CustomUser has no field doctor_type

my debug shows that, the payload is getting received in this format :arrow_heading_down:

    "name": "Iron Man Updated",
    "doctor_type": "PSYCHIATRIST",
    "date_of_birth": "1995-01-01",
    "registration_number": 154878,
    "city": "NY",
    "country": "USA"

my PatientProfile also structured in the same way as DoctorProfile. so same error saying some-field is not available in CustomUser.

Please guide me through this. Or if you want to ask anything, please.