Cannot access 'user' before initialization-CodePudding

I am new in Mern development, and getting this "Cannot access 'user' before initialization" error in controller file

Controller/user.js

const user = require('../models/user')
exports.signup = (req,res)=>{
   console.log('req.body', req.body);
  const user = new user(req.body);
  user.save((err, user)=>{    
if(err){
    return res.status(400).json({
        err
    })
}
res.json({
    user
})
  })
}

Route/user.js

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

const {signup} = require('../controllers/user');

router.post("/signup", signup);
module.exports = router;

CodePudding user response：

On line 1 you define a variable named user.

On line 4 you define a different variable also named user in a different scope.

At the other end of line 4 you try to call the value of that variable as a function, but it doesn't have a value yet. Hence the error message.

You intended to call the function in the variable from line 1, but since the one on line 4 shadows it, you are calling that instead.

Don't shadow your variables.

Change the name of one of them.

CodePudding user response：

Maybe you should try to run the server before running the client.