mongodb multer

https://github.com/expressjs/multer/

you can upload file with multer middleware

<form action="http://localhost:3000/upload" method="POST" enctype="multipart/form-data">
	<input type="hidden" name="pdselected" value="0">
	<input type="text" name="pdname" placeholder="name"><br>
	<input type="text" name="pddesc" placeholder="desc"><br>
	<input type="number" name="pdprice" placeholder="price"><br>
	<input type="text" name="pdcolor" placeholder="color"><br>
	<input type="text" name="pdcate" placeholder="cate"><br>
	<input type="file" name="avatar" multiple="multiple">
	<input type="submit" value="click">
</form>

---

npm install multer --save

---

and then use multer

var multer = require("multer");
var upload = multer({dest:"uploads/"});

---

for one image

app.post("/upload",upload.single('avatar'),function(req,res,next){
	
})

---

for multiple image

app.post('/uploads',upload.array('avatar',2),function(req,res,next){
	
})

---

for no file

app.post('/uploads',upload.none(),function(req,res,next){
	
})

---

var pdSchema = mongoose.Schema({
	selected:String,
	name:String,
	price:Number,
	desc:String,
	img:String,
	color:String,
	cate:String
});

app.post("/upload",upload.array('avatar',2),function(req,res){
	console.log(req.files);
	var imgDist = [];
	req.files.map(function(item){
		imgDist.push(item.filename);
	});
	var pdDetail =new pd({
		selected:req.body.pdselected,
		name:req.body.pdname,
		desc:req.body.pddesc,
		price:req.body.pdprice,
		color:req.body.pdcolor,
		cate:req.body.pdcate,
		img:imgDist.toString()
	});
	console.log(pdDetail)
	pdDetail.save(function(err,doc){
		if(err){
			console.log(err);
		}else{
			// res.json({"code":0,"data":doc});
			res.sendFile(__dirname+"/upload.html");
		}
	})
})

Question: file extension
https://github.com/expressjs/multer/issues/170

reference:
https://stackoverflow.com/questions/36477145/how-to-upload-image-file-and-display-using-express-nodejs
https://developer.mozilla.org/zh-CN/docs/learn/Server-side/Express_Nodejs/mongoose

**
Addditional

you can use https://www.npmjs.com/package/formidable

**