TypeError: Router.use() requires middleware function but got a Object about lumber

[cirokd]

I had this problem when creating a new file in the routes folder according to the documentation:

/* /routes/whoami.js */
const express = require('express');
const router = express.Router();
const Liana = require('forest-express-sequelize');

router.get('/actions/whoami', Liana.ensureAuthenticated, (req, res) => {
  res.send({ success: `You are ${req.user.data.first_name} ${req.user.data.last_name}.` });
});

What's missing is the last line:

module.exports = router;

If anyone still having this issue ran into it by creating a route file, this should fix it.

[SeyZ]

@django-wong @barohatoum @base16soft It's now fixed in the version 1.0.10.

• You can upgrade using npm install -g lumber-cli@latest and regenerate your admin microservice
  or
• You can add in your admin generated folder, modify the app.js file according to this change: d4225b8#diff-fb096da81ac8de5f55989e87d728ca53R32

Feel free to reopen if the problem still appears. Thanks!

[augustocsmartins]

same here.
Ubuntu 14
npm 3.8.6
node v5.11.1

/home/augustoc/hellotickets-admin/HelloTickets/node_modules/express/lib/router/index.js:458
throw new TypeError('Router.use() requires middleware function but got a ' + gettype(fn));
^

TypeError: Router.use() requires middleware function but got a Object
at Function.use (/home/augustoc/hellotickets-admin/HelloTickets/node_modules/express/lib/router/index.js:458:13)
at EventEmitter. (/home/augustoc/hellotickets-admin/HelloTickets/node_modules/express/lib/application.js:219:21)
at Array.forEach (native)
at EventEmitter.use (/home/augustoc/hellotickets-admin/HelloTickets/node_modules/express/lib/application.js:216:7)
at /home/augustoc/hellotickets-admin/HelloTickets/app.js:32:7
at Array.forEach (native)
at Object. (/home/augustoc/hellotickets-admin/HelloTickets/app.js:31:28)
at Module._compile (module.js:413:34)
at Object.Module._extensions..js (module.js:422:10)
at Module.load (module.js:357:32)

[arnaudbesnier]

Hey @xclusivzik , can you try module.exports = router; as explained above?

Thanks.

[xclusivzik]

@arnaudbesnier i did that already still the same issue,
" throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))"

[arnaudbesnier]

Hi @sandeep318kumar,

Did you add customisation to your Lumber generated NodeJS app?
Could you share you app.js code to investigate your issue?

Thanks for your help.

[goldbright00000]

this is my app.js file.
i got same issue like above .

how can i solve this issue ?

[email protected] start G:\upwork\UltraNoteI-Cloud\cryptwallet-admin
cross-env NODE_ENV=development node server

G:\upwork\UltraNoteI-Cloud\cryptwallet-admin\node_modules\express\lib\router\index.js:458
throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))
^

TypeError: Router.use() requires a middleware function but got a Object
at Function.use (G:\upwork\UltraNoteI-Cloud\cryptwallet-admin\node_modules\express\lib\router\index.js:458:13)
at Function. (G:\upwork\UltraNoteI-Cloud\cryptwallet-admin\node_modules\express\lib\application.js:220:21)
at Array.forEach ()
at Function.use (G:\upwork\UltraNoteI-Cloud\cryptwallet-admin\node_modules\express\lib\application.js:217:7)
at Object. (G:\upwork\UltraNoteI-Cloud\cryptwallet-admin\server\index.js:30:5)
at Module._compile (node:internal/modules/cjs/loader:1108:14)
at Object.Module._extensions..js (node:internal/modules/cjs/loader:1137:10)
at Module.load (node:internal/modules/cjs/loader:973:32)
at Function.Module._load (node:internal/modules/cjs/loader:813:14)
at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:76:12)
at node:internal/main/run_main_module:17:47
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [email protected] start: cross-env NODE_ENV=development node server
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [email protected] start script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR! C:\Users\fulls\AppData\Roaming\npm-cache_logs\2021-01-06T05_56_43_703Z-debug.log

[barohatoum]

SAME HERE

OS Type: macOS Sierra 10.12.1
Node: 7.1.0
NPM: 3.10.9

/Users/ibrahimhatoum/Sites/www/sportsadmin/node_modules/express/lib/router/index.js:458 throw new TypeError('Router.use() requires middleware function but got a ' + gettype(fn)); ^ TypeError: Router.use() requires middleware function but got a Object at Function.use (/Users/ibrahimhatoum/Sites/www/sportsadmin/node_modules/express/lib/router/index.js:458:13) at Function.<anonymous> (/Users/ibrahimhatoum/Sites/www/sportsadmin/node_modules/express/lib/application.js:219:21) at Array.forEach (native) at Function.use (/Users/ibrahimhatoum/Sites/www/sportsadmin/node_modules/express/lib/application.js:216:7) at fs.readdirSync.forEach (/Users/ibrahimhatoum/Sites/www/sportsadmin/app.js:32:7) at Array.forEach (native) at Object.<anonymous> (/Users/ibrahimhatoum/Sites/www/sportsadmin/app.js:31:28) at Module._compile (module.js:573:32) at Object.Module._extensions..js (module.js:582:10) at Module.load (module.js:490:32)

[SeyZ]

Thanks for report guys! I'll fix this!

[augustocsmartins]

@SeyZ thanks! now it is working!

[nitinmaram]

Same here

[sreenathe12]

Its not working guys..........

[Kiranyellu]

it's not working here..any one got the problem ?

[SeyZ]

Can you share your generated code to help me reproduce the issue? Thanks!

[SeyZ]

Thanks @cirokd - the documentation has been updated 👍

[MiraiTunga]

@SeyZ The current documentation seems to not have this update the module.exports = router; line is missing from

https://doc.forestadmin.com/developer-guide/express-sequelize.html#example-banning-a-user

[xclusivzik]

i have the same issue
here is the error i encounter

$ node server.js
This is an app!
C:\Users\Desktop\Node.js\chatcat\node_modules\express\lib\router\index.js:458
throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))
^

TypeError: Router.use() requires a middleware function but got a undefined
at Function.use (C:\Users\MFM lekki\Desktop\Node.js\chatcat\node_modules\express\lib\router\index.js:458:13)
at Function. (C:\Users\MFM lekki\Desktop\Node.js\chatcat\node_modules\express\lib\application.js:220:21)
at Array.forEach ()
at Function.use (C:\Users\MFM lekki\Desktop\Node.js\chatcat\node_modules\express\lib\application.js:217:7)
at Object. (C:\Users\Desktop\Node.js\chatcat\server.js:12:5)
at Module._compile (module.js:652:30)
at Object.Module._extensions..js (module.js:663:10)
at Module.load (module.js:565:32)
at tryModuleLoad (module.js:505:12)
at Function.Module._load (module.js:497:3)

---

my code
'use strict';
const router = require('express').Router();

router.get('/', (req, res, next) => {

res.render('login');

});

module.exports = {
router: router
}

[kyle-fitz]

Currently having the same issue
throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))

[prateekvyas2121]

how can i solve it..???..yesterday it was working fine but today morning i don't know what happened to this....

TypeError: Router.use() requires a middleware function but got a string
at Function.use (C:\Users\DELL\Desktop\node_passport_login\node_modules\express\lib\router\index.js:458:13)
at Function. (C:\Users\DELL\Desktop\node_passport_login\node_modules\express\lib\application.js:220:21)
at Array.forEach ()
at Function.use (C:\Users\DELL\Desktop\node_passport_login\node_modules\express\lib\application.js:217:7)
at Object. (C:\Users\DELL\Desktop\node_passport_login\app.js:23:5)
at Module._compile (internal/modules/cjs/loader.js:956:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:973:10)
at Module.load (internal/modules/cjs/loader.js:812:32)
at Function.Module._load (internal/modules/cjs/loader.js:724:14)
at Function.Module.runMain (internal/modules/cjs/loader.js:1025:10)
at internal/main/run_main_module.js:17:11
[nodemon] app crashed - waiting for file changes before starting...

[arnaudbesnier]

Hi @prateekvyas2121,
This is not the exact same error message and, thus, probably not the same issue origin.
Please take the time to detail your issue in another ticket.

(Odds are very hight that such issue is related to code or dependencies changes on you end, especially if the code was working well yesterday)

[sandeep318kumar]

Got this error while starting the server.
Node app.js

C:\Users\abc\Documents\HTML\backend start\yelpCamp\node_modules\express\lib\router\index.js:458
throw new TypeError('Router.use() requires a middleware function but got a ' + gettype(fn))
^

TypeError: Router.use() requires a middleware function but got a Object
at Function.use (C:\Users\abc\Documents\HTML\backend start\yelpCamp\node_modules\express\lib\router\index.js:458:13)
at Function. (C:\Users\abc\Documents\HTML\backend start\yelpCamp\node_modules\express\lib\application.js:220:21)
at Array.forEach ()
at Function.use (C:\Users\abc\Documents\HTML\backend start\yelpCamp\node_modules\express\lib\application.js:217:7)
at Object. (C:\Users\abc\Documents\HTML\backend start\yelpCamp\app.js:68:5)
at Module._compile (internal/modules/cjs/loader.js:955:30)
at Object.Module._extensions..js (internal/modules/cjs/loader.js:991:10)
at Module.load (internal/modules/cjs/loader.js:811:32)
at Function.Module._load (internal/modules/cjs/loader.js:723:14)
at Function.Module.runMain (internal/modules/cjs/loader.js:1043:10)
at internal/main/run_main_module.js:17:11

[jyotsana-khaparde]

Thanks @cirokd

[goldbright00000]

/**

• app.js
• This is the entry file for the application, only setup and boilerplate
• code.
  */

// Needed for redux-saga es6 generator support
import '@babel/polyfill';

// Import all the third party stuff
import React from 'react';
import ReactDOM from 'react-dom';
import { Provider } from 'react-redux';
import { ConnectedRouter } from 'connected-react-router';
import history from 'utils/history';
import 'sanitize.css/sanitize.css';

// Import root app
import App from 'containers/App';

// Import Language Provider
import LanguageProvider from 'containers/LanguageProvider';

// Load the favicon and the .htaccess file
/* eslint-disable import/no-unresolved, import/extensions /
import 'file-loader?name=.htaccess!./.htaccess';
/ eslint-enable import/no-unresolved, import/extensions */

import configureStore from './configureStore';

// Import i18n messages
import { translationMessages } from './i18n';

// Create redux store with history
const initialState = {};
const store = configureStore(initialState, history);
const MOUNT_NODE = document.getElementById('app');

const render = messages => {
ReactDOM.render(






,
MOUNT_NODE,
);
};

if (module.hot) {
// Hot reloadable React components and translation json files
// modules.hot.accept does not accept dynamic dependencies,
// have to be constants at compile-time
module.hot.accept(['./i18n', 'containers/App'], () => {
ReactDOM.unmountComponentAtNode(MOUNT_NODE);
render(translationMessages);
});
}

// Chunked polyfill for browsers without Intl support
if (!window.Intl) {
new Promise(resolve => {
resolve(import('intl'));
})
.then(() => Promise.all([import('intl/locale-data/jsonp/en.js')]))
.then(() => render(translationMessages))
.catch(err => {
throw err;
});
} else {
render(translationMessages);
}

// Install ServiceWorker and AppCache in the end since
// it's not most important operation and if main code fails,
// we do not want it installed
if (process.env.NODE_ENV === 'production') {
require('offline-plugin/runtime').install(); // eslint-disable-line global-require
}