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

Solution

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
    });

});

Comments

[xtabbas]

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

[xtabbas]

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

[xtabbas]

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]

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?

[xtabbas]

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

[lplatz]

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

[RootHacker]

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

[xtabbas]

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?

[RootHacker]

check this link stackoverflow.com/a/39481543/4066767, I have explained it over there

[xtabbas]

So can i use the module.exports inside the async function? doing that also returning null value { } in the log. How can use that db result?

[RootHacker]

check resolution to your 3rd problem I'v edited the answer again..!

[xtabbas]

Im getting error over here : list: function(req, res){ SyntaxError: Unexpected token ( whats wrong?

[RootHacker]

check edited answer now, module.exports need to be object.

[xtabbas]

Okay, i used the data by going ` console.log(allUser.list());` and its working. for now :)

[xtabbas]

Turn out i was using console.log(users) in list : function, please tell me how to send the objects as json because its saying Cannot read property 'json' of undefined when i use return res.json(users);

[RootHacker]

you need to call list() by passing req,res i.e allUser.list(req,res)

[RootHacker]

var userController = require('../controllers/findallusers'); app.get('/allusers', function (req, res) { userController.list(req,res) })

[xtabbas]

okay i get what is happening, but doesn't this mean that we are using the controller.js file for no reason?

[RootHacker]

then pass only callback function to the list and change your list function accordingly. it would be better if you move this to a new question so that scope of this question will remain unchanged.

[xtabbas]

stackoverflow.com/questions/39504219/… I have moved this to another question as you suggested.

[xtabbas]

Also what do you mean by passing only the callback function, can you quickly explain it here ?

[RootHacker]

sure. I'm adding a new method to the same answer which will accept callback

[RootHacker]

check now and to understand callback check this link stackoverflow.com/questions/37216699/… .

[xtabbas]

I think i have alot to learn about the asynchronicity of javascript but right now im running late for my class lol thanks again for your answers