multer文件上载在multer.none（）和multer.any（）回调内部不起作用

Question

在multer.none（）和multer.any（）回调内部无法上传多文件。

我试图在上传到服务器之前从mongodb生成文件名。生成文件名multer文件后，无法在multer.none（）和multer.any（）内部上载文件。

    const doUpload = (testimonial)=>{
    const upload = multer({
        storage: multer.diskStorage({
            destination: (req, file, cb) => cb(null, 'public/uploads/company/testimonials'),
            filename: (req, file, cb) => cb(null,`${testimonial._id}.jpg`)
        }),
        fileFilter: (req, file, cb) =>['image/jpeg','image/jpg','image/png'].includes(file.mimetype) ? cb(null, true) : cb(new Error(RESPONSE.UPLOAD_ERROR))
    });
    upload.single('userAvatar')(req, res, function (err){
        if(err)
            res.json(RESPONSE.UPLOAD_ERROR);
        else{
            res.json(Object.assign({},RESPONSE.SAVED,{ redirect: USER.COMPANY }));
        }
    });
};

multer().none()(req, res, function(){
    let data = req.body;
    Company.findOneAndUpdate({ user_id: req.user._id},{
        $push: {
            testimonials: {
                userName: data.userName,
                organizationName: data.organizationName,
                testimonialDate: data.testimonialDate,
                testimonial: data.testimonial
            }
        }
    },{ 
        runValidators: true,
        new: true
    }).then(company=>{
        doUpload(company.testimonials[company.testimonials.length-1]);
    });
});