Node JS cannot find module error for file in another folder

Question

If i have schema.js in the same folder as index.js doing something like

var schemas = require('./schema');

works fine, but if i put the schema.js in another folder and write

var schemas = require('./folder/schema');

i get an error Cannot find module whats happening?

Edit1 : I got rid of the error by using ..folder/schema instead of single. and the server runs but it still doesn't work properly as I cant use the mongoosedb object returned through module.export from ../model/schema in the index.js file. It says myModel.find is not a function. Whats going on??

controllers/findallusers.js

var myModel = require('../models/schema');

var alluser;

myModel.find({}, function(err, foundData){   
  if(err){
    console.log(err);
    res.status(500).send();
  }
  else{
        alluser = foundData;
      }

    console.log(alluser); <-- this log is defined
});

    console.log(alluser); <-- this log is undefined

    module.exports = alluser; <-- cant export anything

Is the folder directory in the same directory as the index.js file? — arjabbar
– arjabbar, Commented Sep 14, 2016 at 17:22
i mean i have a router folder with index.js and a model folder which has schema.js — xtabbas
– xtabbas, Commented Sep 14, 2016 at 17:26
and im exporting the schema object using module.export in schema,js and trying to use it in index.js by var schemas = require('./model/schema'); — xtabbas
– xtabbas, Commented Sep 14, 2016 at 17:27
It appears that .find() is asynchronous. Therefore IT IS IMPOSSIBLE to return it via module.exports. Instead, export a function that accept a callback or return a promise. — slebetman
– slebetman, Commented Sep 15, 2016 at 3:23
@slebetman I'm doing what pawan mentioned, exporting a function list : funtion(req, res){ } but getting syntax error at list: function(req, res) { whats going on? — xtabbas
– xtabbas, Commented Sep 15, 2016 at 4:45

Community · Accepted Answer · 2017-05-23 11:51:41Z

4

Resolve path to schema.js correctly

Assuming your project structure like this

Project
 |
 +-- routers
 |  |  
 |  +-- index.js    
 +-- models
 |  |  
 |  +-- schema.js


//in index.js 
var schemas = require('../models/schema');

To solve second error i.e myModel.find not a function use, module.exports instead of using module.export

module.exports = myModel;

Resolution to your 3rd Problem

// controllers/findallusers.js --> (keep name simple  i.e userController.js)
var myModel = require('../models/schema');

module.exports =  {

    /**
     * Get All Users
     */
    list: function(req, res) {
       myModel.find({},function(err, users){
          if(err) {
              return res.status(500).json({message: 'Error getting Users.'});
          }
         return res.json(users);
      });
    },
   /**
    * Keep Adding more functions as you want
   */

   create: function(req,res){
       //functionality to create user
   },

   delete: function(req,res){
      // functionality to delete user
   },

   someDummyName: function(callback) {
       myModel.find({},function(err, users){
          if(err) {
            return callback(err)
          }
         return callback(null,users);
      });
    }       

}

// Solution to your question https://stackoverflow.com/questions/39504219/how-to-use-use-callbacks-or-promises-to-return-a-object-from-an-asynchronous-fun

//index.js call this new method i.e someDummyName as  
router.get('/allusers', function(req, res){       

    userController.someDummyName(function(err,result){
      if(err) {
        //return err
      }
      //process result as per your need
    });

});

edited May 23, 2017 at 11:51

CommunityBot

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answered Sep 14, 2016 at 17:43

RootHacker

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21 Comments

xtabbas Over a year ago

Is this real life? using two dots before /model/schema just solved the issue -_-

xtabbas Over a year ago

Actually it still doesn't work properly.. I cant use the mongoosedb object returned through module.export from ../model/schema in the index.js file. It says myModel.find is not a function. Whats going on??

xtabbas Over a year ago

I have added the code, also using the model/schema code directly in the index.js works just fine

RootHacker Over a year ago

check my edited answer, and if its solved all your issues accept the answer.

xtabbas Over a year ago

Please read my last edit, i used the .exports a while ago (that was silly of me) and im stuck in a new problem. can you tell me why alluser is getting undefined right after the call back function?

|

lplatz · Accepted Answer · 2016-09-14 19:37:01Z

0

You are exporting a variable myModel from schema.js and importing just schema in index.js

So, try to reference the .find function using myModel.myModel.find() My guess is that the myModel variable is behind your existing myModel variable in index.js

edited Sep 14, 2016 at 19:37

answered Sep 14, 2016 at 17:25

lplatz

1017 bronze badges

3 Comments

xtabbas Over a year ago

created a package.json file in /models/ folder with what you mentioned. still getting error Cannot find module './models/schema'

xtabbas Over a year ago

Using ..models/schema solved the server issue of module not found error, but now i cant use the database model object which is exported from schema.js in the index.js. whats going on... can you help?

lplatz Over a year ago

Theres my attempt, havnt used mongoose before but in my initial research of it, i think that my be it

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