CODEWITHSUNDEEP
pythondjangoserializationnesteddjango-rest-framework
jigar surana
jigar surana

Reputation: 1306

Integrity error while trying to serialize nested object using django rest framework

Model file

class Address(models.Model):
    address_id = models.AutoField(primary_key=True, auto_created=True)
    address_data = models.CharField(max_length=250)


class User(models.Model):
    user_id = models.AutoField(primary_key=True)
    name = models.CharField(max_length=50)
    address = models.ForeignKey(Address)

Serializer File

class AddressSerializer(serializers.ModelSerializer):

    class Meta:
        model = Address
        fields = ('address_data')


class UserSerializer(serializers.ModelSerializer):
    address = AddressSerializer()

    class Meta:
        model = User
        fields = ('name', 'address')

    def create(self, validated_data):
        address_data = validated_data.pop('address')
        user = User.objects.create(**validated_data)
        Address.objects.create(user=user, **address_data)
        return user

I have the above code snippet in the model and serializer file. I am getting a integrity error while serializing and saving the following object.

{"name": "John", "address": {"address_data": "some address"}}

I am trying to save two objects in 2 tables with a foreign key constraint. The place where I feel its erroring out is user = User.objects.create(**validated_data) because address object is still not created and I am trying to save the user object without the address reference.

I checked all the django-rest-framework documentation. I am not able to understand where I am going wrong.

Upvotes: 1

Views: 1609

Answers (1)

Jaakko
Jaakko

Reputation: 584

In your UserSerializer the model is Address. Shouldn't it be User?

Edit

Your create method on the UserSerializer should be like this:

def create(self, validated_data):
        address_data = validated_data.pop('address')
        address = Address.objects.create(**address_data)
        validated_data['address'] = address
        user = User.objects.create(**validated_data)

Your User has Foreign Key to Address, but you were not passing that on to the User's create method.

Upvotes: 1

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