Post a list of objects with the current user in Django Rest Framework

Question

Took me a while get it done, how to post a list/array full of JSON objects with the current user, a lot of mixed answers but this one works for me, I hope this helps someone, keep learning, keep having fun.

Next step is to set up the get_queryset to get orders per user

Answer 1

Post a list of objects to the same order in the order table (check fk_order variable in OrderProductsSerializer).

There are two many to many tables, OrderModel y ProductModel, so to add more fields I create the OrderProductsModel table and yeah, thats how I approached the situation, lookin for to know if this is bad or good to learn from more experienced professionals and grow , thank you people, cheers

Open to suggestions to improve and avoid share errors or bad practices, I will be editing answer.

############################# models.py######################################

class OrderProductsModel(models.Model):
        quantity_order_product = models.IntegerField(default=0, null=True, blank=True)
        price_order_product = models.FloatField(default=0,null=True, blank=True)
        fk_product = models.ForeignKey(ProductModel, null=True, blank=True, on_delete=models.SET_NULL)
        fk_user = models.ForeignKey(CustomUser, null=True, blank=True, on_delete=models.SET_NULL)
        ...
        ...
        ... more fields

############################# views.py######################################

class PostOrderProduct(mixins.CreateModelMixin,
                        generics.GenericAPIView):
    
    serializer_class = OrderProductsSerializer
    
    def get_queryset(self):
        return OrderProductsModel.objects.all()

    def post(self, request, *args, **kwargs):
        items = request.data
        if isinstance(items, list):
            serializer = self.serializer_class( instance='',
                                                data=items, 
                                                many=True, 
                                                context = {
                                                            "request": self.request,
                                                            }
                                                            )
            if serializer.is_valid(raise_exception=True):
                serializer.save()
                return Response(serializer.data, status=status.HTTP_200_OK)
            return Response(serializer.errors, status=status.HTTP_400_BAD_REQUEST)
        
        elif isinstance(items, dict):
            return self.create(request, *args, **kwargs)
   

############################# serializers.py ######################################
class OrderProductsListSerializer(serializers.ListSerializer):

    def update(self, instance, validated_data):
        # Perform creations and updates.
        ret = []
        for data in validated_data:
            if data.get('id') not in {'', None}:
                OrderProductsModel.objects.filter(id=data['id']).update(**data)
                ret.append(data)
            else:
                ret.append(OrderProductsModel.objects.create(**data))
        return ret


class OrderProductsSerializer(serializers.ModelSerializer):
    fk_user = serializers.HiddenField(default=serializers.CurrentUserDefault())
    fk_order = serializers.HiddenField(default=OrderModel.objects.create())
    
    class Meta:
        model = OrderProductsModel
        list_serializer_class = OrderProductsListSerializer
        fields = ['fk_user', 'quantity_order_product', 'price_order_product', 'fk_product']