DjangoRest serializers: Save Foreignkey relation and serialize - django

Question

I am new to Django rest and serializers concept
I have this kind of DB structure
User 1->N Address,
User 1->N Phone
User is a django.contrib.auth.models.User. Address and Phone both models contains this field user_id = models.ForeignKey(User, on_delete=models.CASCADE)
In my UserSerializer looks like this
class UserSerializer(serializers.ModelSerializer):
address = AddressSerializer(many=False)
phone = PhoneSerializer(many=False)
class Meta:
model = User
fields = (
'id', 'username',
'first_name', 'last_name',
'email', 'password',
'address', 'phone')
def create(self, validated_data):
# Save user.
user = User.objects.create(
first_name=validated_data['first_name'],
last_name=validated_data['last_name'],
username=validated_data['username'],
email=validated_data['email'],
)
user.set_password(validated_data['password'])
user.save()
# User's address
address_data = validated_data['address']
address_data['user_id'] = user.id
address = Address.objects.create(**address_data)
# User's phone
phone_data = validated_data['phone']
phone_data['user_id'] = user.id
phone = Phone.objects.create(**phone_data)
return user
And AddressSerializer:
class AddressSerializer(serializers.ModelSerializer):
class Meta:
model = Address
fields = (
'user_id', 'address', 'pin_code', 'state', 'city', 'country')
I am able to create User but while doing serializer.data I am getting this error:
AttributeError: Got AttributeError when attempting to get a value for field `address` on serializer `UserSerializer`.
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'.
EDIT:
My create method looks like this
def create(self, validated_data):
password = validated_data.pop('password')
validated_data['username'] = validated_data['email']
user = User.objects.create(**validated_data)
user.set_password(password)
user.save()
return user

Answer 1

Your fields for address and phone should be called address_set and phone_set if you haven't specified related_name explicitly
class UserSerializer(serializers.ModelSerializer):
address_set = AddressSerializer(many=False)
phone_set = PhoneSerializer(many=False)
class Meta:
model = User
fields = (
'id', 'username',
'first_name', 'last_name',
'email', 'password',
'address_set', 'phone_set'
)
or
class UserSerializer(serializers.ModelSerializer):
address = AddressSerializer(many=False, source='address_set')
phone = PhoneSerializer(many=False, source='phone_set')
class Meta:
model = User
fields = (
'id', 'username',
'first_name', 'last_name',
'email', 'password',
'address', 'phone'
)