The problem occurs when I try to add a product on cart just by clicking on add to cart button. the following bug occures. please cooperate with me in this regard thanks.

How can I modify my code so that as i click on add to cart button. concerned product will added in cart page

carts>views.py

from .models import Cart
from .models import CartItem, Product


# Create your views here.
def _cart_id(request):
    cart = request.session.session_key
    if not cart:
        cart = request.session.create()
    return cart

def add_cart(request, product_id): 
    product = Product.objects.get(id=product_id)  #get the product
    try:
        cart = Cart.objects.get(cart_id = _cart_id(request))  #get the cart using the cart_id present in the session
    except Cart.DoesNotExist:
        cart = Cart.objects.create(
            cart_id = _cart_id(request)
    )
    cart.save()

    try:
        cart_item = CartItem.objects.get(product=product, cart=cart)
        cart_item.QUANTITY += 1      
        cart_item.save()
    except CartItem.DoesNotExist:
        cart_item = CartItem.objects.create(
            product = product,
            quantity = 1,
            cart = cart,
        )
        cart_item.save()
    return redirect('cart')
 
def cart(request):
    return render(request, 'store/cart.html')````




**urls.py file**

````from django.urls import path

from .import views

urlpatterns = [
    path('', views.cart, name='cart'),
    path('add_cart/<int:product_id>/', views.add_cart, name='add_cart'),````

]