Multer的用法已更改.

The usage for Multer has changed.

当前Multer构造函数仅接受三个选项:

Currently Multer constructor accepts only three options:

1. dist/storage
2. fileFilter
3. 限制

现在重命名，onFileUploadStart，onFileUploadComplete将不起作用.

now rename, onFileUploadStart, onFileUploadComplete would not work.

但是可以使用DiskStorage重命名

however renaming can be done using DiskStorage

var storage = multer.diskStorage({
    destination: function (req, file, cb) {
        cb(null, '/tmp/my-uploads')
    },
    filename: function (req, file, cb) {
        cb(null, file.fieldname + '-' + Date.now())
  }
})

var upload = multer({ storage: storage })

看看这些链接:

• https://github.com/expressjs/multer
• 多个回调不起作用?

• https://github.com/expressjs/multer
• multer callbacks not working ?