Nodejs - throw unpredictable error as `property 'get' of undefined`

Question

I am trying to run my node app. But I am getting an error, which I am not able to understand. please any one help me to understand this?

here is my code :

var express = require("express"),
  app = express(),
  path = require("path");

app.get("/", function( req, res ) {
    res.sendfile( path.join(__dirname + '/index.html'));
});

var adminRouter = express.Router();

adminRouter.get('/', function(req, res) {
    res.send('I am the dashboard!');
});

app.use("/admin", adminRouter);

app.listen(process.env.PORT, process.env.IP);
console.log("basic app listeners!");

the error I am getting is :

adminRouter.get('/', function(req, res) {
           ^

TypeError: Cannot read property 'get' of undefined
    at Object.<anonymous> (/home/ubuntu/workspace/server.js:16:12)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Function.Module.runMain (module.js:441:10)
    at startup (node.js:139:18)
    at node.js:990:3

Can any one help me? I am running my app in cloud9.

thanks in advance!!

Did you try: express.Router().route() . It is not depreciated. — Ruhul Amin
– Ruhul Amin, Commented Mar 10, 2017 at 6:58
Your code looks correct and I cannot reproduce the problem. What version of node and express are you using? — Leon
– Leon, Commented Mar 10, 2017 at 7:04

Remario · Accepted Answer · 2017-03-10 07:35:58Z

3

Your express version less than +4 , probably version 3. Try

npm uninstall express --save

Then re-install.

adminRouter.get('/', function(req, res) {
res.send('I am the dashboard!');
});

try it like this as well.

 adminRouter.route('/').get(function(req,res){
res.json({'hello there from main route!'});
});

answered Mar 10, 2017 at 7:35

Remario

3,8612 gold badges22 silver badges25 bronze badges

Sign up to request clarification or add additional context in comments.

2 Comments

Remario Over a year ago

best bet is to delete your node_modules folder. Change the express version to latest and re run npm install on the updated json package. cloud 9 does not support express version +4.x. That's the main reason for not executing the code correctly.

Remario Over a year ago

4.15.2 is the latest for express.

Shubham Batra · Accepted Answer · 2017-03-10 07:37:41Z

2

Actually this is express version problem.

express.Router(); is supported on version 4.x and cloud 9 support by default 3.x

change your package.json

"express": "^4.15.2",

and delete node_module folder then run

npm install

answered Mar 10, 2017 at 7:37

Shubham Batra

2,3755 gold badges32 silver badges48 bronze badges

Collectives™ on Stack Overflow

Nodejs - throw unpredictable error as `property 'get' of undefined`

2 Answers 2

2 Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

2 Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related