Can't send back object in multer method - node.js

Question

I'm performing a file upload via multer, and since I want to store the file in a specific location, as well as name it my own file name, I am using the destination and filename attributes that multer offers when creating the storage object.
The problem I'm having is I want to send back to the client the information of my newly created object after storing it in the database. However, there is no res parameter to do this and I can only do this in my post method, which does not have the object I just created.
var storage = multer.diskStorage({
destination: function (req, file, cb) {
cb(null, './uploads'); // Absolute path. Folder must exist, will not be created for you.
},
filename: function (req, file, cb) {
var fileType = file.mimetype.split("/")[1];
var fileDestination = file.originalname + '-' + Date.now() + "." + fileType;
cb(null, fileDestination);
var map = new Map({
mapName: req.body.mapTitle,
mapImagePath: "./uploads/" + fileDestination,
ownerId: req.user._id
});
Map.createMap(map, function(err, map){
if(err)
next(err);
console.log(map);
});
}
});
var upload = multer({ storage: storage });
router.post('/', upload.single('mapImage'), function (req, res) {
res.status(200).send({
code: 200, success: "Map Created."
});
});

Answer 1

Multer attaches the files to the request object, you have access to these in your post method:
app.post('/', upload.single('mapImage'), function (req, res, next) {
console.log(req.file.filename); // prints the filename
console.log(req.file.destination); // prints the directory
console.log(req.file.path); // prints the full path (directory + filename)
console.log(req.file.originalname); // prints the name before you renamed it
console.log(req.file.size); // prints the size of the file (in bytes)
res.json(req.file);
});