node.js multer Speichern von Dateinamen in db

Question

Ich versuche, hochgeladene Dateinamen in db zu speichern? Vielen Dank. Grundsätzlich wie kann ich Multer file.name in die Datenbank übergeben. Mein Versuch wird mit dieser 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

Die req.files.fileimage !== undefined ist immer false?

Die Variable fileimage Sie im folgenden erklärt hat, einen begrenzten

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

Wenn Sie einige Daten übergeben wollen (wie fileimage) von einer Middleware zu einem anderen Sie so etwas wie diese verwenden können.

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

und Sie können in der DB speichern als

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