node.js multer将文件名保存到数据库中

我试图将上传的文件名保存到数据库？ 谢谢。 基本上我怎样才能将multer file.name传递到数据库中。 我尝试使用这个var： var fileimage = file.name;

 router.use(multer({ // https://github.com/expressjs/multer dest: './uploads/', limits : { fileSize:100000 }, rename: function (fieldname, filename) { return filename.replace(/\W+/g, '-').toLowerCase(); }, onFileUploadData: function (file, data, req, res) { // file : { fieldname, originalname, name, encoding, mimetype, path, extension, size, truncated, buffer } var params = { Bucket: 'lemybucket01', Key: file.name, Body: data }; s3.putObject(params, function (perr, pres) { if (perr) { console.log("Error uploading data: ", perr); } else { console.log("Successfully uploaded data to myBucket/myKey"); } }); }, onFileUploadComplete: function (file) { var fileimage = file.name; } })); router.route('/') //POST a new prod .post(function(req, res) { if(req.files.fileimage !== undefined){ // `image` is the field name from your form //res.redirect("/uploads"); // success }else{ res.send("error, no file chosen"); } // Get values from POST request. These can be done through forms or REST calls. These rely on the "name" attributes for forms var username = req.body.username; //call the create function for our database mongoose.model('Prod').create({ username : username, fileimage : fileimage }, function (err, prod) { if (err) { res.send("There was a problem adding the information to the database."); } else { //Prod has been created console.log('POST creating new prod: ' + prod); res.format({ //HTML response will set the location and redirect back to the home page. You could also create a 'success' page if that's your thing html: function(){ // If it worked, set the header so the address bar doesn't still say /adduser res.location("prods"); // And forward to success page res.redirect("/prods"); }, //JSON response will show the newly created prod json: function(){ res.json(bloprodb); } }); } }) }); 

Answer 1

req.files.fileimage !== undefined总是为false ？

你在下面声明的variablesfileimage范围是有限的

 onFileUploadComplete: function (file) { var fileimage = file.name; } 

如果你想把一些数据（比如fileimage）从一个中间件传递到另一个中间件，你可以使用类似的东西。

 onFileUploadComplete: function (file, req, res) { var fileimage = file.name; req.middlewareStorage = { fileimage : fileimage//, //otherKey : otherValue } } 

你可以保存在数据库中

 var fileimage = req.middlewareStorage.fileimage; mongoose.model('Prod').create({ username : username, fileimage : fileimage }, function (err, prod) { // do some stuff });