Node.js Express req.query is undefined

Question

I'm running the following code on Node.js with Express 4.7.2

express.get('/test1',function(req, res) {
  var ttt = false;
  if (req.query.username === undefined) ttt = true;
  res.json({query: ttt});
});

I call the URL:

{{protocol}}://{{server}}/test1?username=1

And I get the result:

{query: true}

Which shows req.query.username is indeed undefined

What am I missing? How come the query param is not passed in?

How are you "calling the URL"? Using cURL? A browser? Something else? — mscdex, Sep 02 '14 at 03:55
I had this problem. Turns out it was a spelling mistake. I was using `querry` instead of `query` — DollarAkshay, May 09 '18 at 11:23
Can you console log req.query object and see what is the result — Sandeep Patel, Jul 11 '18 at 08:49

score 3 · Answer 1 · answered Sep 02 '14 at 03:58

3

The code you've shown works fine for me with node v0.10.30 and express 4.8.7:

var app = require('express')();

app.get('/test1',function(req, res) {
  var ttt = false;
  if (req.query.username === undefined) ttt = true;
  res.json({query: ttt});
});

app.listen(8000);

I then navigate to http://localhost:8000/test1?username=1 and it displays {"query":false}.

answered Sep 02 '14 at 03:58

mscdex

104,356
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1

but `username=1` and it should be returning `{query: true}` – Mulan Sep 02 '14 at 03:59
3

Not with the logic in the original code. I just copied it verbatim. – mscdex Sep 02 '14 at 04:01
I have same problem: `req.query` is undefined for me: https://stackoverflow.com/q/45928112/630169 What is the problem could be?! – Aleksey Kontsevich Aug 29 '17 at 00:03

score 0 · Answer 2 · edited Mar 09 '23 at 15:56

0

It seams that query typeof is string, and string of "undefined" is truthy.

In your code it should be:

if (req.query.username === "undefined")
  ttt = true;

edited Mar 09 '23 at 15:56

Tyler2P

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answered Mar 05 '23 at 13:29

OrcaSoft

1

Node.js Express req.query is undefined

2 Answers2