node.js - Uploading multiple files with nodemailer/sendgrid -

is there way upload multiple attachments sendgrid nodemailer/express/multer? i'm able send single file thoroughly testing array of attachments failed.

this controller function submit files:

    $scope.submitemail = function(email) {      var formdata = new formdata();      $scope.email.to = $scope.email_employer;       formdata.append('from', $scope.email.from);     formdata.append('to', $scope.email.to);     formdata.append('subject', $scope.email.subject);     formdata.append('text', $scope.email.text);              var fileselect = document.getelementbyid('file-select');     var files = fileselect.files;     (var = 0; < files.length; i++) {       var file = files[i];        // add file request.       formdata.append('attachment', file, file.name);     }      /*     object.keys($scope.email).foreach(function(key) {         formdata.append(key, $scope.email[key]);     });     */      $http.post('/api/email', formdata, {         transformrequest: angular.identity,         headers: {'content-type': undefined}     }).then(function(data, status) {          console.log("sent ok");      }, function(data, status) {          //here have add error message e.g. "we not send form @ moment. try again later"         console.log(data);     }); }; 

this app.js try send file sendgrid

// set default node environment development process.env.node_env = process.env.node_env || 'development';  var express = require('express'); var config = require('./config/environment'); var http = require('http'); var bodyparser = require('body-parser');  var multer = require('multer'); var upload = multer({ dest: './uploads/' }); //var upload = multer();  var nodemailer = require('nodemailer'); var sgtransport = require('nodemailer-sendgrid-transport');  var options = {   auth: {     api_user: '##########',     api_key: '###########'  } }  var mailer = nodemailer.createtransport(sgtransport(options));   // setup server var app = express();  var server = require('http').createserver(app); require('./config/express')(app); require('./routes')(app);   app.post('/api/email', upload.array('attachment', 4), function(req, res, next)     {  console.log(req.file);  var mailoptions = {     to: req.body.to,     from: req.body.from,     subject: req.body.subject,     text: req.body.text,     attachments: [         {             filename: req.file.originalname,             path: req.file.path         }     ] };  mailer.sendmail(mailoptions, function(err, res) {     if (err) {          console.log(err);     }     console.log(res);   }); });  // start server server.listen(config.port, config.ip, function () { console.log('express server listening on %d, in %s mode', config.port, app.get('env')); });  // expose app exports = module.exports = app; 

the following error shown:

typeerror: cannot read property 'originalname' of undefined @ /applications/mamp/htdocs/myproject/server/app.js:51:35 @ layer.handle [as handle_request] (/applications/mamp/htdocs/myproject/node_modules/express/lib/router/layer.js:82:5) @ next (/applications/mamp/htdocs/myproject/node_modules/express/lib/router/route.js:100:13) @ done (/applications/mamp/htdocs/myproject/node_modules/multer/lib/make-middleware.js:36:7) @ indicatedone (/applications/mamp/htdocs/myproject/node_modules/multer/lib/make-middleware.js:40:51) @ /applications/mamp/htdocs/myproject/node_modules/multer/lib/make-middleware.js:142:11 @ writestream.<anonymous> (/applications/mamp/htdocs/myproject/node_modules/multer/storage/disk.js:43:9) @ emitnone (events.js:72:20) @ writestream.emit (events.js:166:7) @ finishmaybe (_stream_writable.js:468:14) 

thank update. clear me. error means req.file undefined. , correct. check multer docs https://github.com/expressjs/multer:

if use upload.single file data in req.file. when use upload.array then, files data in req.files (plural form of file).

to fix problem change in code req.file req.files , remember array files data.

for example orginalname of first file in req.files[0].originalname