Question

我正在使用Ajax发布数据。它引发了错误403（禁止），然后我在视图中添加了@csrf_exempt。此后，发生错误500（内部服务器错误）。我尝试了不同的操作，例如遵循docuement添加额外的代码并将其导入模板。我正在努力解决这两个问题。一个人走了，然后另一个人发生了。

此外，使用action属性而不是Ajax可以使视图正常工作。所以我不是我认为的观点问题。

detail.html：

<script>
    $(document).ready(function () {
        $("#add").click(function (event) {
            event.preventDefault();
            $.ajax({
                url: '{% url "cart:add_to_cart" %}',
                type: "POST",
                dataType: 'json',

                success: function (response_data) {
                    alert('second alert');
                    $("#cartButton").text("Cart" + "(" + response_data.quantity + ")");
                },
            });
        });
    });

</script>

<form method="post">
    {% csrf_token %}
    <select name="quantity">
        <option>1</option>
        <option>2</option>
        <option>3</option>
    </select>
    <input name="bookID" value=" {{ book.id }} " hidden>
    <button id="add" type="submit"> Add to Cart</button>
</form>

一旦我添加了@csrf_exempt，就会出现错误500。

购物车/views.py：

@csrf_exempt
def add_books(request):
    print('submitted')
    c = Cart.objects.get(user=request.user)

    if request.method == 'POST':
        q = request.POST.get('quantity', )
        book_id = request.POST.get('bookID', )

        the_id = int(book_id)
        the_quantity = int(q)
        b = Book.objects.get(id=the_id)
        c = Cart.objects.get(user=request.user)
        title = b.title

        book = BooksInCart.objects.filter(cart=c).filter(book__title=title)
        if book:
            book_in_cart = book.get(book__title=title)
            book_in_cart.quantity += the_quantity
            book_in_cart.save()
        else:
            book_in_cart = BooksInCart.objects.create(cart=c, book=b, quantity=the_quantity)
            book_in_cart.save()

        response_data = {
            'quantity': BooksInCart.objects.filter(cart=c).aggregate(item_quantity=Sum('quantity'))['item_quantity']
        }
        return JsonResponse(response_data)

部分错误信息：

"ValueError at /cart/add_books/↵invalid literal for int() with base 10: ''↵↵Request Method: POST↵Request URL: http://127.0.0.1:8000/cart/add_books/↵Django Version: 2.1

Answer 1

q = request.POST.get('quantity', ) # <--- this or
book_id = request.POST.get('bookID', ) # <---- this is coming back as an empty string
# The below code is causing an error because the above code isn't finding anything
# And it is returning to you an empty string, which it cannot convert to an int()
the_id = int(book_id)
the_quantity = int(q)

您需要确保POST请求中返回一个值，否则，您将继续遇到空字符串的问题。如果需要该值，则可以在用户发布该表单之前要求该值，否则可能会在服务器上的验证中引发错误。

Django-Ajax POST错误403（禁止）和500（内部服务器错误）

1 个答案: