class ProductImageSerializer(serializers.ModelSerializer):
    1     violated = serializers.SerializerMethodField()
    2
    3     def get_violated(self, obj):
    4         return obj.found_copyright_violations.exists()  # if there are violations
    5
    6     class Meta:
    7         model = ProductImage
    8         fields = ('product', 'image_id', 'url', 'selected', 'violated')
    9         # otherwise, there will be validation errors
   10         extra_kwargs = {"image_id": {"validators": []}}
   11
   12
   13 class ProductSerializer(serializers.ModelSerializer):
   14     images = ProductImageSerializer(many=True)
   15
   16     class Meta:
   17         model = Product
   18         fields = ('product_id', 'title', 'images', 'active')
   19
   20     def update(self, instance, validated_data):
   21         # Updating images selected field
   22         for image_data in validated_data.get("images"):
>> 23             image_instance = ProductImage.objects.get(
   24                 pk=image_data.get("image_id"),
   25             )
   26
   27             image_instance.selected = image_data.get("selected")
   28             image_instance.save()
   29
   30         selected_images = instance.images.filter(selected=True)
   31
   32         # If there are selected images, set to either true or false.
   33         if selected_images:
   34             instance.active = validated_data.get('active', instance.active)
   35         # Otherwise false
   36         else:
   37             instance.active = False
   38
   39         instance.save()
   40
   41         return instance