¿Subir varios archivos con multer, pero de diferentes campos?

Es fundamental comprender el código bien previamente a usarlo a tu trabajo si tquieres aportar algo puedes dejarlo en los comentarios.

Solución:

Lo que quieres es upload.fields():

app.post('/rest/upload',
         upload.fields([
           name: 'video', maxCount: 1
         , 
           name: 'subtitles', maxCount: 1
         ]), function(req, res, next)
  // ...

Uso de Multer Cargar archivos desde dos campos de formularios separados en páginas diferentes En este ejemplo, tengo dos campos: curriculum vitae e imagen. Currículum vitae en una forma e imagen en otra. Ambos están en páginas separadas. Primeras dependencias de importación

const path = require('path'); // for getting file extension
const multer = require('multer'); // for uploading files
const uuidv4 = require('uuidv4'); // for naming files with random characters

Defina fileStorage y fileFilter:

const fileStorage = multer.diskStorage(
  destination: (req, file, cb) =>  // setting destination of uploading files        
    if (file.fieldname === "resume")  // if uploading resume
      cb(null, 'resumes');
     else  // else uploading image
      cb(null, 'images');
    
  ,
  filename: (req, file, cb) =>  // naming file
    cb(null, file.fieldname+"-"+uuidv4()+path.extname(file.originalname));
  
);

const fileFilter = (req, file, cb) => 
  if (file.fieldname === "resume")  else 
;

Middleware para multer

app.use(
  multer(
     
      storage: fileStorage, 
      limits:
         
          fileSize:'2mb' 
        , 
      fileFilter: fileFilter 
    
  ).fields(
    [
       
        name: 'resume', 
        maxCount: 1 
      , 
       
        name: 'image', 
        maxCount: 1 
      
    ]
  )
);

Y luego llama a tus rutas. Es posible que deba agregar protección csrf o autenticación junto con esto para mayor seguridad. Pero esto debería funcionar bien.

If you want to upload multiple files/images from the same form, I have used the below code and it works fine. The path of the image is stored in the database; I will skip the database path and go straight to the upload function and how the fields are passed to the save function.

    const path = require('path');
    const multer = require('multer');
    const storage = multer.diskStorage(
        destination: (req, file, cb)=>
            if(file.fieldname==="profile")
            
            cb(null, './uploads/profiles/')
            
           else if(file.fieldname==="natid")
           
               cb(null, './uploads/ids/');
           
           else if(file.fieldname==="certificate")
           
               cb(null, './uploads/certificates/')
           
        ,
        filename:(req,file,cb)=>
            if(file.fieldname==="profile")
                cb(null, file.fieldname+Date.now()+path.extname(file.originalname));
            
          else if(file.fieldname==="natid")
            cb(null, file.fieldname+Date.now()+path.extname(file.originalname));
          
          else if(file.fieldname==="certificate")
            cb(null, file.fieldname+Date.now()+path.extname(file.originalname));
          
        
    );
    const upload = multer(
        storage: storage,
        limits: 
            fileSize: 1024 * 1024 * 10
        ,
        fileFilter: (req, file, cb) => 
            checkFileType(file, cb);
        
    ).fields(
        [
            
            name:'profile',
            maxCount:1
            ,
            
           name:'natid', maxCount:1
            ,
            
           name:'certificate', maxCount:1
            
        ]
    );

    function checkFileType(file, cb) 
    //at the save function 

 upload(req, res, (err) => {
        if (err) 
            console.log(err);
         else {
            if (req.file == "undefined") 
                console.log("No image selected!")
             else {
                let datecreated = new Date();
                let fullnames = req.body.firstname + ' ' + req.body.lastname;
                let formatedphone = '';
                let phone = req.body.personalphone;
                if (phone.charAt(0) == '0') 
                    formatedphone = '+254' + phone.substring(1);
                 else if ((phone.charAt(0) == '+') && (phone.length > 12 || phone.length <= 15)) 
                    formatedphone = phone
                
                let teachers = 
                    "teacherid": teacherid,
                    "schoolcode": req.body.schoolcode,
                    "fullnames": fullnames,
                    "email": req.body.email,
                    "dateofbirth": req.body.dateofbirth,
                    "nationalid": req.body.nationalid,
                    "personalphone": formatedphone,
                    "profile": req.files.profile[0].path,
                    "natid": req.files.natid[0].path,
                    "certificate":req.files.certificate[0].path
                
                connection.query('INSERT INTO teachers SET ?', teachers, (error, results, fields) => {`enter code here`
                    if (error) 
                        res.json(
                            status: false,
                            message: 'there are some error with query'
                        )
                        console.log(error);
                     else console.log("Saved successfully");

Si sostienes alguna desconfianza o capacidad de acrecentar nuestro tutorial puedes ejecutar un exégesis y con mucho placer lo ojearemos.

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