def cart_update(request):
product_id = request.POST.get('product_id')
try:
product_obj = Product.objects.get(id=product_id)
except Product.DoesNotExist():
print("Product doesn't already there.")
cart_obj, is_new = Cart.objects.new_or_get(request)
if product_obj in cart_obj.products.all():
cart_obj.products.remove(product_obj)
else:
cart_obj.products.add(product_obj)
request.session['cart_items'] = cart_obj.products.count()
return redirect('cart:home')
