def validate()

in server/store/serializers.py [0:0]

• 28 lines of code
• 3 McCabe index (conditional complexity)

    def validate(self, data):
        try:
            product = Product.objects.get(pk=data["id"])
        except Product.DoesNotExist:
            raise serializers.ValidationError(detail={"status": "product_not_found"})

        requested = data["countRequested"]
        if product.inventory_count < requested:
            data["countFulfilled"] = product.inventory_count

            # Log error by writing structured JSON. Can be then used with log-based alerting, metrics, etc.
            error_name = "INSUFFICIENT_PRODUCT_ERROR"
            print(
                json.dumps(
                    {
                        "severity": "ERROR",
                        "error": error_name,
                        "message": f"{error_name}: A purchase was attempted where there was insufficient inventory to fulfil the order.",
                        "product": product.id,
                        "method": "CartItemSerializer.validate()",
                        "countRequested": data["countRequested"],
                        "countFulfilled": data["countFulfilled"],
                    }
                )
            )

            raise serializers.ValidationError(
                detail={"status": "insufficient_product", "items": data}
            )
        else:
            data["countFulfilled"] = requested
        return data