Django：forループの合計値

Question

私はformsetの注文価格の合計したい。 int(food.price) * int(f.order_count)の合計額は ですか？

def reservation_f(request, year, month, day): 
    # order_count = Food.objects.filter(serve_date__startswith = datetime.date(int(year), int(month), int(day))).count() 
    ReservationFormset = modelformset_factory(
     Reservation, 
     extra = 1, 
     fields = ('order_count', 'order_name', 'order_date'), 
     form = Reserve, 
     ) 
    if request.method == "POST": 
     formset = ReservationFormset(request.POST, queryset=Food.objects.none(), 
     form_kwargs={'month': month, 'year': year, 'day':day}) 
     if formset.is_valid(): 
      formset = formset.save(commit=False) 
      for f in formset: 
       food = Food.objects.get(
        serve_date__startswith = datetime.date(int(year), int(month), int(day)), 
        food_name=f.order_name) 
       print int(food.price) * int(f.order_count) 
      for f in formset: 
       f.user = request.user 
       f.save() 

     return HttpResponse("Add") 
    else: 
     formset = ReservationFormset(queryset=Food.objects.none(), 
     form_kwargs={'month': month, 'year': year, 'day':day}) 
     return render(request, 'form.html', {'formset':formset}) 

Answer 1

変数の意味と種類はあまり明確ではないので間違っている可能性があります。 しかし、あなたはそのようなことをすることができます：

for f in formset: 
    food = Food.objects.get(
     se_date__startswith = datetime.date(int(year), int(month), int(day)), 
     food_name=f.order_name) 
    print sum([int(item.price) * int(f.order_count) for item in food])