uploading two files from two fields with multer as middleware-CodePudding

i'm trying to upload two files with different file extensions with multer from two fields but when i try it with postman the result always for the file is null, what is the solution for my problem? here is my code

middleware/uploadEpub

const multer = require('multer')

exports.uploadEpub = (epubFile, coverFile) => {
const storage = multer.diskStorage({
    destination: function (req, file, cb) {
        cb(null, "uploads")
    },
    filename: function (req, file, cb) {
        cb(null, Date.now()   '-'   file.originalname.replace(/\s/g, ""))
    }
})

const upload = multer({
    storage
}).fields([{name: "bookFile", maxCount: 1},{name: "coverFile", maxCount: 1}])
}

controller/book

exports.addBook = async (req, res) => {
try {
    const { ...data } = req.body

    const newBook = await book.create({
        ...data,
        bookFile: req.file,
        coverFile: req.file
    })
    let bookData = await book.findOne({
        where: {
            id: newBook.id
        },
        attributes:{
            exclude: ['createdAt','updatedAt']
        }
    })

    bookData = JSON.parse(JSON.stringify(bookData))
    res.send({
        status: "Success",
        Book: {
            ...bookData
        }
    })
} catch (error) {
    console.log(error)
    res.status(500).send({
        status: "Failed",
        message: "Server Error"
    })
}
}

CodePudding user response：

try to upload the file as form-data in postman, and put the key with the same name that you have set in multer, the postman will look like this

CodePudding user response：

Multer set up

const multer = require('multer')
const path = require('path')
const { nanoid } = require('nanoid')

//Set Storage Engine
const storage = multer.diskStorage({
    destination: './public/uploads/',
    filename: (req, file, callback) => {
        const id = nanoid(6)
        const newFilename = `${file.fieldname}_${id}-${new Date().toISOString().replace(/:/g, '-')}${path.extname(file.originalname)}`
        callback(null, newFilename)
    }
})

const upload = multer({
    storage: storage,
    limits: { fileSize: 5572864 }, // up to 5.5 MB
    fileFilter: (req, file, callback) => {
        checkFileType(file, callback)
    },
})

//Check File Type
const checkFileType = (file, cb) => {
    //Allowed extensions
    const fileType = /jpeg|jpg|png|gif|svg|pdf|epub/

    //Check extension
    const extname = fileType.test(path.extname(file.originalname).toLowerCase())

    //Check mimetype
    const mimetype = fileType.test(file.mimetype)

    if (extname && mimetype) {
        return cb(null, true)
    } else {
        return cb('Error: wrong file type!')
    }
}

module.exports = upload

/***** middlewares.js *****/

module.exports.imageUploader = (req, res, next)=>{
    const files = req.files
    const uploadedFiles = []
    for (var i = 0; i <images.length; i  ){
        uploadFiles.push('https://yourserver.com/public/uploads/'   files[i].filename)
    }
    req.uploadFiles = uploadFiles.toString() //appending files to req
    next()
    return
}

/**** index.js or app.js ****/ //where your routes are defined

router.post('/books/add', upload.array('images', 10), imageUploader, book.addBook) // allowing up to 10 files to be uploaded, calling imageUploader as a middleware

/*** Controllers/book ***/

exports.addBook = async (req, res) => {
   const uploadedFiles = req.uploadFiles; //catching files from imageUploader middleware

   // ... rest of your code
}