通过 JSON.stringify() 将数组传递给服务器并得到奇怪的结果

Question

我正在 node.js、express.js 和 mongodb 上开发一个应用程序。我的任务是将数组传递到服务器端并将其插入到数据库中。我在整个网络上进行了搜索，发现我需要通过 JSON.stringify() 对我的数组进行字符串化，但是当我在服务器端对其进行控制台时，它看起来很奇怪，并且每次使用 JSON.parse() 的尝试都以错误结束。 这是一个通过 JSON.stringify() 传递的数组：

    [{
    "city": "London",
    "date": "20.11.2015",
    "sector": "A",
    "row": "1",
    "place": "1"
}, {
    "city": "London",
    "date": "20.11.2015",
    "sector": "A",
    "row": "1",
    "place": "2"
}, {
    "city": "London",
    "date": "20.11.2015",
    "sector": "A",
    "row": "2",
    "place": "1"
}, {
    "city": "London",
    "date": "20.11.2015",
    "sector": "A",
    "row": "2",
    "place": "2"
}, {
    "city": "London",
    "date": "20.11.2015",
    "sector": "B",
    "row": "1",
    "place": "1"
}, {
    "city": "London",
    "date": "20.11.2015",
    "sector": "B",
    "row": "1",
    "place": "2"
}, {
    "city": "London",
    "date": "20.11.2015",
    "sector": "B",
    "row": "2",
    "place": "1"
}, {
    "city": "London",
    "date": "20.11.2015",
    "sector": "B",
    "row": "2",
    "place": "2"
}]

当我将它传递到服务器端时，它看起来像这样：

{ '[{"city":"London","date":"20.11.2015","sector":"A","row":"1","place":"1"},{"city":"London","date":"20.11.2015","sector":"A","row":"1","place":"2"},{"city":"London","date":"20.11.2015","sector":"A","row":"2","place":"1"},{"city":"London","date":"20.11.2015","sector":"A","row":"2","place":"2"},{"city":"London","date":"20.11.2015","sector":"B","row":"1","place":"1"},{"city":"London","date":"20.11.2015","sector":"B","row":"1","place":"2"},{"city":"London","date":"20.11.2015","sector":"B","row":"2","place":"1"},{"city":"London","date":"20.11.2015","sector":"B","row":"2","place":"2"}]': ''}

任何解析它的尝试都会导致 500 错误。那我做错了什么？

Answer 1

你看到它在做什么了吗？它使用您传递的 JSON 作为没有值的键。

你可以这样做

$.ajax({ 
   method: "POST", 
   url: "/tickets/addticket", 
   dataType: "json",
   data : { val : JSON.stringify(dataToSend) }
}

node.js 读取 val 的查询字符串值

其他选项是设置内容类型

$.ajax({
    url: "/tickets/addticket", 
    type: 'POST', 
    contentType: 'application/json', 
    data: JSON.stringify(dataToSend)}
);