Getting req.param undefined

Question

I am using Expressjs version 4.I am getting 'undefined' on req.param. Here is my example : app.js

var express = require('express');
var bodyParser = require('body-parser');
var newdata = require('./routes/new');
........................
......................
app.use(bodyParser());
app.use(bodyParser.json());
app.use(bodyParser.urlencoded());

app.use('/new', newdata);

./routes/new

var express = require('express');
var router = express.Router();

router.get('/', function(req, res){
    res.render('newdata', {
        title: 'Add new data'
    })
});

router.post('/', function(req, res){
    console.log(req.param['email']);
    res.end();
});

module.exports = router;

newdata.html

<form action="/new" role="form" method="POST">
            <div class="form-group">
                <label for="exampleInputEmail1">Email address</label>
                <input type="email" class="form-control" name="email" placeholder="Enter email">

I also tried with req.body and req.params , but the answer is still same.

Have you verified that your form is actually being sent as `application/x-www-form-urlencoded` and not `multipart/form-data` somehow? — mscdex, May 08 '14 at 20:21

nowk · Accepted Answer · 2014-05-09T13:22:41.373

53

req.params Refers to the variables in your route path.

app.get("/posts/:id", ...

// => req.params.id

Post data can be referenced through req.body

app.post("/posts", ...

// => req.body.email

This assumes you are using the bodyParser middleware.

And then there is req.query, for those ?query=strings.

You can use req.param() for either of the 3 above. The look up order is params, body, query.

edited May 09 '14 at 13:22

answered May 08 '14 at 18:44

nowk

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2

`req.param()` the function already checks `req.params` (the "variables in your route path"), `req.body`, and `req.query`. – mscdex May 08 '14 at 20:18
Hi , Suppose "/mobile/custom/******/deviceVersion/:deviceType" is my request . could you please tell me how to check "deviceType" against undefined? – Arj 1411 Jan 27 '17 at 07:25
Why `req.param()` is empty for me (using query string)? – Aleksey Kontsevich Aug 28 '17 at 21:55
This answer is super awesome ! POST worked for me with req.body.fieldName – Joseph Apr 07 '18 at 00:55
@nowk your solution is great, But When I have implemented it, I'm stuck with the error **Cannot read property 'productId' of undefined** here is the code `router.get('/:productId', (res, req, next )=>{ const id = req.params.productId if (id === 'gift-cards'){ res.send('you invoked Giftcards ID') } else { res.send(`You entered the ${id} ID`) } })` – Abdul R. Oct 01 '19 at 14:18

score 8 · Answer 2 · answered May 08 '14 at 18:05

8

param is a function, not an object. So you need to use req.param('email');

answered May 08 '14 at 18:05

mscdex

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That doesn't make any difference. – sahil shekhawat Feb 14 '16 at 17:09
I'm not sure why there is negative feedback as this solved my problem perfectly. I was following some old (or just plain wrong?) examples which used param like an object, but this guided me to the right path. – Jonty Morris Jul 17 '18 at 13:24

score 2 · Answer 3 · answered Apr 30 '19 at 23:59

2

For anyone experiencing similar issues make sure to use params instead of param.

// Correct way
req.params.ID

// Wrong way
req.param.ID

answered Apr 30 '19 at 23:59

College Code

907
6
12

OP stated in question: "I also tried with `req.body` and `req.params`, but the answer is still same." – S.S. Anne May 01 '19 at 00:16
but his code sample has param not params – Asim Ghaffar Mar 01 '22 at 16:19

score 1 · Answer 4 · answered Dec 26 '20 at 08:16

1

I also face the problem when I want to access req.params.id but I solved it by

index.js(main)

app.use('/addRoom', route);

router.js(router)

route.post('/:id',(req,res)=>{});

this works for me

answered Dec 26 '20 at 08:16

tanay pingalkar

31
1
2

score -1 · Answer 5 · edited Feb 09 '19 at 14:45

-1

Two types are parameter are present
1. query (req.query.('name defined in route'));
2. path (req.params.('name defined in route));

edited Feb 09 '19 at 14:45

Til

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answered Feb 09 '19 at 14:10

Abhinav Singh

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Getting req.param undefined

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