Api

[Tosin Ayoola]

Good morning guyz,  

I need help on this one,  it on writing api that will Shows the product count for each manufacturer as users add products real time. 

I have no idea how to solve this problem,  i will any suggestion 

Thanks 

[Motaz Hejaze]

Anything real time will be done by sockets , which i think is not the solution you need..

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[Naveen Arora]

Create an API which returns count, then use javascript to update the front end part.

[Tosin Ayoola]

halo having 2 issues now

(1st) getting an integrity err

(2nd) i have a api code that return's count but still i'm not getting wat i expected

below is my codes and the err msg i'm getting

###APIView

class CartViewSet(viewsets.ModelViewSet):
    serializer_class = CartDetailSerializer
    queryset = CartList.objects.all()


    #@detail_route(methods=['post', 'put'])
    def add_item(request, self, pk=None):
        cart = self.get_object()
        try:
            product = Product.objects.get(
                pk = request.data['product_id']
            )
            quantity = int(request.data['quantity'])
        except Exception as e:
            print (e)
            return Response({'status': 'fail' })

        if product.quantity < 0 or product.quantity - quantity < 0:
            print('sorry check back leta')
            return Response({'status': 'fail'})

         existing_cart = CartList.objects.filter(product=product,       
            cart=cart).first()
        if existing_cart:
            existing_cart.quantity +=quantity
            existing_cart.save()
        else:
            new_cart = CartList(cart=cart, product=product,       
                  quantity=quantity)
            new_cart.save()
            product_list =      
        Product.Objects.filter(manufacturer=manufacturer).count()
        serializer = CartSerializer(cart)
        return Response(serializer.data)

Serializer

class CartDetailSerializer(serializers.ModelSerializer):
    customer = UserSerializer(read_only =True)
    items = serializers.StringRelatedField(many=True)

    class Meta:
        model = CartList
        fields = ('id', 'customer', 'items', 'created', 'updated')


class CartListSerializer(serializers.ModelSerializer):
    class Meta:
        model = CartList
        fields = ('product', 'quantity')

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[Naveen Arora]

Can you share the traceback of error you are facing ?

Cheers,

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[Tosin Ayoola]

i have it attached as an attached file already 

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