为什么$ .each说这个JSON对象是未定义的？(Why does $.each say this JSON object is undefined?)

为什么$ .each说这个JSON对象是未定义的？(Why does $.each say this JSON object is undefined?)

这是我的Javascript：

$.post('foo.php', { request: Request }, function(data) { $.each(data.chats, function(i, chat) { ... }); });

这里是JSON，通过Firebug和其他一切验证，此代码正在接收：

{ "chats": [ { "chat_id": "22", "user_status": "Listening", "user_ping": "2010-06-22 15:53:57", "messages": [ { "chat_id": "22", "line_id": "5", "message": "Hello", "timestamp": "15:53" } ] } ] }

...为什么当我运行它时，它不起作用，并且Firebug抛出了“对象未定义”的错误，并在jquery.js的第552行中给出了“length = object.length”的链接，并显示'未定义'当我做一个console.log（data.chats）？ console.log（data）显示完整的JSON响应，但出于某种原因，它不想处理data.chats ...我已经缩小了'$ .each'这一行的错误范围。

我相当肯定这是一个非常简单的错误，当有人向我指出这一点时，我会面临一些问题，但在这一点上我完全困惑。 （是的，“聊天”应该是一个JSON数组，用于处理将来的多个聊天，与消息相同。）

Here is my Javascript:

$.post('foo.php', { request: Request }, function(data) { $.each(data.chats, function(i, chat) { ... }); });

And here is the JSON that, verified by Firebug and everything else, this code is receiving:

{ "chats": [ { "chat_id": "22", "user_status": "Listening", "user_ping": "2010-06-22 15:53:57", "messages": [ { "chat_id": "22", "line_id": "5", "message": "Hello", "timestamp": "15:53" } ] } ] }

... so why, when I run this, does it not work, and Firebug throws the error that the "object is undefined", with a link to "length = object.length" on line 552 of jquery.js, and shows 'undefined' when I do a console.log(data.chats)? A console.log(data) shows the full JSON response, but for some reason it doesn't want to deal with data.chats... I've narrowed the error down the '$.each' line.

I'm reasonably sure this is a very simple mistake and I'll facepalm when someone points it out to me, but at this point I'm completely confused. (and yes, "chats" is supposed to be a JSON array, to handle multiple chats in the future, same with messages.)

最满意答案

告诉它，你期待JSON - 默认情况下它会将响应视为html。

$.post('foo.php', { request: Request }, function(data) { $.each(data.chats, function(i, chat) { ... }); }, 'json');

Tell it that you are expecting JSON -- by default it will treat the response as html.

$.post('foo.php', { request: Request }, function(data) { $.each(data.chats, function(i, chat) { ... }); }, 'json');