无法读取未定义云的属性'buffer'

Question

我有这个错误

TypeError[ERR_INVALID_ARG_TYPE]：；块"；参数的类型必须为字符串或Buffer的实例。收到对象的实例

但我不知道如何解决：

这是我的代码库：

router.post('/upload/image', fileUpload.single('file'), function (req, res, next) {
let streamUpload = (req) => {
return new Promise((resolve, reject) => {
let stream = cloudinary.uploader.upload_stream(
(error, result) => {
if (result) {
resolve(result);
} else {
reject(error);
}
}
);
console.log("Images ", req.files);  
streamifier.createReadStream(req.files.buffer).pipe(stream);
}).
catch(error => { throw error; });
};

async function upload(req) {
let result = await streamUpload(req);
console.log(result);
}

upload(req);
});

感谢任何帮助我解决这个问题的人

Answer 1

当您使用fileUpload.single('file'),时，应该使用req.file而不是req.files

注：req.file.buffer仅适用于memorystorage

const storage = multer.memoryStorage();
cont upload = multer({ storage: storage });

https://www.npmjs.com/package/multer#memorystorage

console.log("Images ", req.file);  
streamifier.createReadStream(req.file.buffer).pipe(stream);

https://www.npmjs.com/package/multer

app.post('/profile', upload.single('avatar'), function (req, res, next) {
// req.file is the `avatar` file
// req.body will hold the text fields, if there were any
})

Answer 2

cloudinary.uploader.upload_stream需要两个参数，第一个参数应该是string | buffer，第二个参数应该为callback object (error, result)。

您将(error, result)作为唯一的参数传递，我相信这就是导致错误的原因。

cloudinary.uploader.upload_stream('YOUR BUFFER OR STRING HERE', (error, result)=>{})