在Django中在服务器端处理的数据表中搜索记录时出现Ajax错误

Question

我的问题是我无法在搜索栏中搜索数据表中的特定记录（例如snumber）。浏览器引发错误：

DataTables警告：表ID =仓库-Ajax错误。有关此错误的更多信息，请参见http://datatables.net/tn/7

下面是我的代码。

我的观点

class ProductSerialNumbersListJSon(LoginRequiredMixin,BaseDatatableView):
# my model
model = ProductSerialNumbers
columns = ['snumber' , 'order','product','registration_date']
order_columns = ['snumber','order','product','registration_date']
max_display_length = 100

def get_initial_queryset(self):
    print("FETCHED DATA")
    #print(ProductSerialNumbers.objects.filter(Q(snumber__isnull=True)|Q(order_id__isnull=True)|Q (order_id__finished=0)).count())
    return ProductSerialNumbers.objects.filter(Q(snumber__isnull=True)|Q(order_id__isnull=True)|Q (order_id__finished=0))


def render_column(self, row, column):
    return super(ProductSerialNumbersListJSon, self).render_column(row, column)

我的模板

 <script language="javascript">
        $(document).ready(function () {
            /* Here begins the DataTable configuration. */
            $('#warehouse').DataTable({
                /* Tell the DataTable that we need server-side processing. */
                "serverSide": true,
                "paging": true,
                "pageLength": 10,
                "processing": true,
                "searching": true,
                /* Set up the data source */
                ajax: {
                    url: "{% url "warehouse_list_json" %}"

                },
                  "columns": 
                           [
        {name: "snumber",},
        {name: "order",},
        {name: "product",},
        {name: "registration_date",},
      ]
            });
        });
    </script> 

为了正确搜索，我在这里缺少什么？