猫鼬中的错误处理 [英] Error handling in Mongoose

问题描述

我正在使用 Restify 和

I'm creating an API using Restify and Mongoose, and I'm completely new to both. I can't seem to figure out the proper way to handle errors in Mongoose / Node.

截至目前，我正在尝试执行以下操作:

As of now, I'm trying to do something like this:

Submission.findById(req.params.submission_id, function(err, data) {

    if (err) 
        return next(err);

    res.send(data);

});

我正在尝试为此调用GET(针对不存在的用户).而不是发送回简单的错误消息，而是导致我的整个节点应用程序失败.我对return next(err)的用户以及应该怎么做感到困惑.

I'm attempting to call a GET on this (for a user that not exist). And rather than sending back a simple error message, it causes my entire node application to fail. I'm a bit confused on the user of return next(err) and what that exactly should do.

非常感谢您的帮助.

推荐答案

未找到匹配项的findById查询在Mongoose级别上不是错误，因此，如果您希望将其以这种方式处理，自己做:

A findById query that doesn't find a match isn't an error at the Mongoose level, so you if you want it treated that way you have to do it yourself:

Submission.findById(req.params.submission_id, function(err, data) {

    if (err)
        return next(err);
    else if (!data)
        return next(new Error("User not found"));

    res.send(data);

});

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