Django multiple serializers with relation - django

Question

I have two tables of users and I am creating a form to store the user information.
Models.py
class MyUser(User):
address = models.CharField(max_length=200)
city = models.CharField(max_length=200)
expire_date = models.DateField()
This creates a table with user_ptr_id to the auth_user table of django.
I created two serializers: one for the User:
class UserSerializer(serializers.ModelSerializer):
first_name = serializers.CharField(min_length=2, required=True)
last_name = serializers.CharField(min_length=2, required=True)
email = serializers.EmailField(min_length=5, required=True)
password = serializers.CharField(min_length=8, write_only=True, required=True)
class Meta:
model = User
fields = ('email', 'first_name', 'last_name', 'password')
def create(self, validated_data):
return UserSerializer(**validated_data)
And MyUser class:
class MyUserSerializer(serializers.ModelSerializer):
address = serializers.CharField(max_length=200)
city = serializers.CharField(max_length=200)
class Meta:
model = MyUser
fields = ('city', 'address')
def create(self, validated_data):
return MyUser(**validated_data)
As I am using Django Rest-Framework-Auth, I craeted a serializer to catch the data, but I don't know how to let the things work together. In the "MyUserSerializer" class, I also perform many validate checks, that I omitted here to keep the code clean.
Code below doesn't work
class UserSignup(serializers.Serializer):
user = UserSerializer()
my_user = MyUserSerializer()
confirm_psw = serializers.CharField(min_length=8, write_only=True, required=True)
def validate(self, data):
if not data["user"].get('password') or not data.get('confirm_psw'):
raise serializers.ValidationError("Please enter a password and confirm it.")
if data["user"].get('password') != data.get('confirm_psw'):
raise serializers.ValidationError("Those passwords don't match.")
return data
def save(self, validated_data):
user_data = self.validated_data["user"]
my_user = self.validated_data["my_user"]
return user_data, my_user
def create(self, validated_data):
user_data = validated_data.pop('user')
user = User.objects.create(user_data)
my_user = validated_data.pop('my_user')
my_user["user_ptr_id"] = user.id
MyUser.objects.create(**ua_user)
return user
How do I merge the two serializers to correctly perform the user registration?
Thanks