Not Null constrained error on field handled in views.py

Question

I am working with django rest framework. I have Product and Review models. Review is related to Product like so;

class Product(models.Model):
    name = model         


        

Answer 1

You are almost right. You passed the product instance, so it should be included in the validated_data for the ReviewSerializer.create method. But you don't use it when you are actually creating the review instance.

class ReviewSerializer(serializers.ModelSerializer):
    author = UserSerializer(read_only=True)
    class Meta:
        model = Review
        fields = ['id', 'author', 'title', 'body', 'is_approved', 'created']

    def create(self, validated_data):
        title = validated_data.get('title')
        body = validated_data.get('body')
        author = self.context['request'].user
        product = validated_data.get('product')
        review = Review.objects.create(
            title=title, 
            body=body, 
            author=author, 
            product=product
        )
    return review

https://www.django-rest-framework.org/api-guide/serializers/#passing-additional-attributes-to-save

Also why can't you just have a product field on your review serializer?