There is error when trying to make order in django

Question

When I try to order something, I keep getting this error:

Here is my views.py

    if not request.user.is_authenticated:
    session = request.session
    cart = session.get(settings.CART_SESSION_ID)
    del session['cart']
else:
    customer = request.user.customer
    order, created = Order.objects.get_or_create(
        customer=customer, complete=False)

    order_product, created = OrderProduct.objects.get_or_create(
        order=order, )
    order.save()
messages.success(request, 'Заказ успешно оформлен. Проверьте свою электронную почту!!!')
return redirect('product_list')

Please can anyone help me to fix this error?

Answer 1

if not request.user.is_authenticated:
    session = request.session
    cart = session.get(settings.CART_SESSION_ID)
    if cart is not None:
        del session[settings.CART_SESSION_ID]
else:
    customer = request.user.customer
    order, created = Order.objects.get_or_create(
        customer=customer, complete=False)

    order_products = OrderProduct.objects.filter(order=order)
    if order_products:
        order_product = order_products[0]
    else:
        order_product = OrderProduct.objects.create(order=order)

    order.save()
    messages.success(request, 'Заказ успешно оформлен. Проверьте свою электронную почту!!!')
    session = request.session
    cart = session.get(settings.CART_SESSION_ID)
    if cart is not None:
        # Remove cart items from the session
        del session[settings.CART_SESSION_ID]
        session.modified = True
  
return redirect('product_list')