Django Ajax删除某条数据

<script>
    $("tr").on("click","#ajax_delete",function () {
        {#        var token=$("[name='csrfmiddlewaretoken']").val()#}
        $.ajax({
            url:"/ajax_delete/",
            type:"POST",
            data:{
                book_id:$(this).val(),
                csrfmiddlewaretoken: '{{ csrf_token }}'
            },
            success:function (res) {
                alert(JSON.parse(res))
                $('#ajax_delete').parents('tr').remove()
            }
        })
    })
</script>