WSGIRequest' 对象没有属性 'session_key

Question

当我尝试访问会话时出现此错误我无法理解为什么它不理解什么是会话它在已安装的应用程序中它知道什么是会话

def _cart_id(request):
    cart = request.session_key
    if not cart:
        cart = request.session.create()
    return cart

def add_cart(request,id):
    prod = Product.objects.get(id = id)
    try:
        cart = Cart.objects.get(cart_id = _cart_id(request))

    except Cart.DoesNotExist:
        cart = Cart.objects.create(
            cart_id = _cart_id(request)
        )
    cart.save()

    try:
        cart_item = CartItem.object.get(product = prod,cart = cart)
        cart_item.quantity += cart_item.quantity
    except CartItem.DoesNotExist:
        cart_item = CartItem.objects.create(
            product = prod,
            quantity = 1,
            cart = cart, 
        )
        cart_item.save()

    return redirect('/shop/') 

Answer 1

request 对象没有session_key，但有session。而session_key 在session 内部。然后：

def _cart_id(request):
    # Not request.session_key but request.session.session_key
    cart = request.session.session_key
    if not cart:
        cart = request.session.create()
    return cart