renaming uploaded file nodejs and multer - node.js

Question

problem with file name in Multer
i am using express.js and multer to upload images to server. i act like this:
var storage = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, "../client/member/upload");
},
filename: function (req, file, callback) {
console.log('1', 1);
callback(null, file.fieldname + "_" + Date.now() + "_" + file.originalname);
}
});
var upload = multer({ storage : storage}).single('userPhoto');
but the problem is that never file name changes.
my uploader handler:
function memberUpload(request, response) {
var storage = multer.diskStorage({
destination: function (req, file, callback) {
callback(null, "../client/member/upload");
},
filename: function (req, file, callback) {
console.log('1', 1);
callback(null, file.fieldname + "_" + Date.now() + "_" + file.originalname);
}
});
var upload = multer({ storage : storage}).single('userPhoto');
var folderName = path.join(__dirname, '../', 'client/member/upload');
if (!fs.existsSync(folderName)) {
fs.mkdir(folderName, function (err) {
if (err) {
return response.status(500).send(err);
}
else {
upload(request, response, function (err) {
if (err) {
return response.status(400)
.send('No files were uploaded.');
}
var sentFile = request.files.file,
fileName = (request.files.file && request.files.file.name) ? request.files.file.name : 'test';
sentFile.mv(path.join(__dirname, '../', 'client/member/upload/', fileName), function (err) {
mime.lookup(path.join(__dirname, '../', 'client/member/upload/', fileName)); // => 'text/plain'
if (err) {
return response.status(500)
.send(err);
}
response.send({'location': '../member/upload/' + fileName});
});
});
}
});
}
else {
upload(request, response, function (err) {
if (err) {
return response.status(400)
.send('No files were uploaded.');
}
var sentFile = request.files.file,
fileName = (request.files.file && request.files.file.name) ? request.files.file.name : 'test';
sentFile.mv(path.join(__dirname, '../', 'client/member/upload/', fileName), function (err) {
mime.lookup(path.join(__dirname, '../', 'client/member/upload/', fileName)); // => 'text/plain'
if (err) {
return response.status(500)
.send(err);
}
response.send({'location': '../member/upload/' + fileName});
});
});
}
}
the file save into correct directory with name "blobid0.jpeg", "blobid1.png" and so on ...
what is my fault?

Answer 1

Here is my code for uploading any file(pdf, txt, png) to server.Hope this will help you.
exports.saveMedia = ((req, res) => {
const storage = multer.diskStorage({
destination: (req, file, callback) => {
callback(null, (config.const.path.base + config.const.path.productReviewMedia));
},
filename: (req, file, callback) => {
callback(null, Date.now() + '-' + file.originalname);
}
});
const upload = multer({storage: storage}).any('file');
upload(req, res, (err) => {
if (err) {
return res.status(400).send({
message: helper.getErrorMessage(err)
});
}
let results = req.files.map((file) => {
return {
mediaName: file.filename,
origMediaName: file.originalname,
mediaSource: 'http://' + req.headers.host + config.const.path.productReviewMedia + file.filename
}
});
res.status(200).json(results);
});
});