def update_item(request): response = HttpResponse() if request.method == "POST": item_name = request.POST['name'] item_amount = int(request.POST['amount']) item_initamount = request.POST['initial_amount'] item_fridge_id = request.POST['fridge_id'] item_upc = request.POST['upc'] fridge_obj = Fridge.objects.get(id=item_fridge_id) # if UPC code and Item pair already match add to # current amount if len(Item.objects.filter(fridge__id=item_fridge_id).filter(name=item_name)) == 0: item_to_save = Item(name=item_name, amount=item_amount, initial_amount=item_initamount, fridge=fridge_obj, upc=item_upc) else: item_to_save = Item.objects.get(name=item_name) if item_to_save.amount >= 0: if item_upc == "999999999": item_to_save.amount = item_amount else: item_to_save.amount += item_amount else: item_to_save.amount = item_amount item_to_save.initial_amount = item_amount item_to_save.save() posted_item = Item.objects.filter(fridge_id=item_fridge_id).filter(name=item_name) serializers.serialize("json", posted_item, stream=response) return response