尝试在不刷新页面Django/Ajax的情况下添加到购物车（内部服务器错误）

我有这个错误

cart/create/？product\u id=1500（内部服务器错误）

我不明白为什么：）我试图先使用Ajax。尝试在购物车中添加产品而不刷新页面

从此链接添加产品

<a href="#" data-id="{{ product.id }}" class="add_to_cart"><button>Add product</button></a>

我的看法

def cart_create(request):
    cart = Cart(request)
    product_id = request.GET.get('product_id')
    product = Product.objects.get(id=product_id)
    cart.add(product=product)

    return JsonResponse('')

js

有关

JsonResponse

的说明，请参阅

---

您需要将

dict

传递给

JsonResponse

，而不仅仅是一个空字符串。或者，如果设置了

safe=False

，则可以传递json可序列化对象。但即使这样，我也不认为空字符串是有效的JSON。

向我们展示完整的错误堆栈trace@dirkgroten，更新的

JsonResponse

将dict作为其

数据

参数，而不是字符串。即使在成功的情况下，发送回一些东西也是一种很好的做法，例如

JsonResponse（{'status'：'OK'}）

，但是

JsonResponse（{}）

也会起作用。@dirkgroten，噢，谢谢你：它帮助了我）

def cart_create(request):
    cart = Cart(request)
    product_id = request.GET.get('product_id')
    product = Product.objects.get(id=product_id)
    cart.add(product=product)

    return JsonResponse('')

<script type="text/javascript">
    $(document).ready(function(){
        $('.add_to_cart').on('click', function(){
            product_id = $(this).attr('data-id')
            data = {
                product_id: product_id
            }

            $.ajax({
                type: 'GET',
                url: '{% url "cart:cart_create" %}',
                data: data,
                success: function(data){
                    console.log('success')
                }
            })
        })
    });
</script>

<header>
    {% with total_items=cart|length %}
        {% if cart|length > 0 %}
            Our cart:

            <a href="{% url 'cart:cart_show' %}" id="cart_count">
                {{ total_items }} products {{ cart.get_total_price }} &#8381;
            </a>
        {% else %}
            <a href="{% url 'cart:cart_show' %}">Cart is empty</a>
        {% endif %}
    {% endwith %}

    <h1><a href="{% url 'shop:product_list' %}">Main</a ></h1>
</header>

terminal
Internal Server Error: /cart/create/
Traceback (most recent call last):
  File "/home/kory/project/django-shop/.env/lib/python3.7/site-packages/django/core/handlers/exception.py", line 34, in inner
    response = get_response(request)
  File "/home/kory/project/django-shop/.env/lib/python3.7/site-packages/django/core/handlers/base.py", line 115, in _get_response
    response = self.process_exception_by_middleware(e, request)
  File "/home/kory/project/django-shop/.env/lib/python3.7/site-packages/django/core/handlers/base.py", line 113, in _get_response
    response = wrapped_callback(request, *callback_args, **callback_kwargs)
  File "/home/kory/project/django-shop/cart/views.py", line 21, in cart_create
    return JsonResponse('')
  File "/home/kory/project/django-shop/.env/lib/python3.7/site-packages/django/http/response.py", line 552, in __init__
    'In order to allow non-dict objects to be serialized set the '
TypeError: In order to allow non-dict objects to be serialized set the safe parameter to False.

console.log
jquery.min.js:4 GET http://localhost:8000/cart/create/?product_id=1 500 (Internal Server Error)