错误：Route.get() 需要回调 function 但在使用导入的 function 时得到 [object Undefined]

Question

I am checking if a user is logged in a route called forum. I am importing it like this. The file is routes/forum.js

const isloggedinimport = require('../index')

I have the function on index.js

const isloggedin = (req,res,next) => {
  if(req.user) {
    next()
  }
  else {
    res.render('loginerror',)
  }
}

I am exporting with

module.exports = isloggedin 

When I try to run this

router.get('/', isloggedinimport.isloggedin, (req, res) => { 
    res.render('monitors/monitorhome')
});


module.exports = router

I get the error that Route.get() requires a callback function but got a [object Undefined]

The error is on this line

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

How do I fix this?

Answer 1

When exporting the function, try using the following code:

module.exports.isloggedin = isloggedin

This will set the property isloggedin to the function so that when you call isloggedinimport.isloggedin , it will access the function properly. Alternatively, you could use the following code to export your function:

module.exports = isloggedin

and then use this code to import the function:

const isloggedin = require('../index')

...

router.get('/', isloggedin, (req, res) => { 
    res.render('monitors/monitorhome')
});

Answer 2

Had the same problem and fixed it by adding brackets around the function you want to export:

module.exports = {isloggedin};