Node.js EXDEV重命名错误 [英] Node.js EXDEV rename error

问题描述

我一直在玩一本我在一本关于Node.js的书中找到的代码。这是一个上传图片的简单应用程序。

I've been playing with some code I found in a book about Node.js. It is a simple app which uploads images.

它显示EXDEV错误（500错误：EXDEV，重命名）。

It shows the EXDEV error (500 Error: EXDEV, rename).

有人能给我一个暗示吗？这是我的代码：

Could someone give me a hint? Here's my code:

exports.submit = function(dir) {
    return function(req, res, next) {
        var img = req.files.photo.image;
        var name = req.body.photo.name || img.name;
        var path = join(dir, img.name);

        fs.rename(img.path, path, function (err) {
            if(err) return next(err);

            Photo.create({
                name: name,
                path: img.name
            }, function (err) {
                if(err) return next(err);
                res.redirect('/');
            });
        });
    };
};

推荐答案

重命名文件无法跨设备完成。我的猜测是你的上传目录（默认为 / tmp ）在另一个分区/驱动器上作为你的目标目录（包含在 dir 变量）。

Renaming files cannot be done cross-device. My guess is that your upload directory (which by default is /tmp) is on another partition/drive as your target directory (contained in the dir variable).

一些解决方案：

• configure上传目录与目标目录位于同一分区/驱动器上;这取决于你用来处理文件上传的模块， express.bodyParser （以及它使用的模块， connect.multipart ）接受 uploadDir 选项即可使用;



• 在启动Node应用程序之前，将 TMPDIR 环境变量设置为指向同一分区上的临时目录/ drive作为目标目录。如果您使用的是Unix类型的操作系统：

• configure the upload directory to be on the same partition/drive as your target directory; this depends on which module you're using to handle file uploads, express.bodyParser (and the module it uses, connect.multipart) accepts an uploadDir option that you can use;

• before starting your Node app, set the TMPDIR environment variable to point to a temporary directory on the same partition/drive as your target directory. If you're using a Unix-type OS:

env TMPDIR=/path/to/directory node app.js

而不是从shell设置环境变量，将其设置在Node应用程序的顶部：

instead of setting the environment variable from your shell, set it at the top of your Node app:

process.env.TMPDIR = '/path/to/directory';

而不是重命名，请使用像 mv 可以跨设备工作;

instead of renaming, use a module like mv that can work cross-device;

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