नहीं मिल सकता है मॉड्यूल '../मॉडल/* बनाने के लिए कोशिश कर बाकी एपीआई में Node.js और MongoDB

शुरू बनाने के बाहर बाकी एपीआई के साथ Node.js और मोंगो DB तो वहाँ कुछ है जो मैं करना चाहते हैं पता करने के लिए. मैं इस त्रुटि हो रही है

Cannot find module '../models/book

के साथ और अधिक विस्तृत त्रुटि के रूप में नीचे दिखाया गया है :

PS D:\node_apps\mongo1> npm start

> [email protected] start D:\node_apps\mongo1
> node ./bin/www

internal/modules/cjs/loader.js:892        
  throw err;
  ^

    Error: Cannot find module '../models/book'
    Require stack:
    - D:\node_apps\mongo1\routes\users.js     
    - D:\node_apps\mongo1\app.js
    - D:\node_apps\mongo1\bin\www
        at Function.Module._resolveFilename (internal/modules/cjs/loader.js:889:15)
        at Function.Module._load (internal/modules/cjs/loader.js:745:27)
        at Module.require (internal/modules/cjs/loader.js:961:19)
        at require (internal/modules/cjs/helpers.js:92:18)
        at Object.<anonymous> (D:\node_apps\mongo1\routes\users.js:3:12)
        at Module._compile (internal/modules/cjs/loader.js:1072:14)
        at Object.Module._extensions..js (internal/modules/cjs/loader.js:1101:10)
        at Module.load (internal/modules/cjs/loader.js:937:32)
        at Function.Module._load (internal/modules/cjs/loader.js:778:12)
        at Module.require (internal/modules/cjs/loader.js:961:19) {
      code: 'MODULE_NOT_FOUND',
      requireStack: [
        'D:\\node_apps\\mongo1\\routes\\users.js',
        'D:\\node_apps\\mongo1\\app.js',
        'D:\\node_apps\\mongo1\\bin\\www'
      ]
    PS D:\node_apps\mongo1> npm start
    
    > [email protected] start D:\node_apps\mongo1
    > node ./bin/www
    
    internal/modules/cjs/loader.js:892        
      throw err;
      ^
    
    Error: Cannot find module './routes/books'
    Require stack:
    - D:\node_apps\mongo1\app.js
    - D:\node_apps\mongo1\bin\www
        at Function.Module._resolveFilename (internal/modules/cjs/loader.js:889:15)
        at Function.Module._load (internal/modules/cjs/loader.js:745:27)
        at Module.require (internal/modules/cjs/loader.js:961:19)
        at require (internal/modules/cjs/helpers.js:92:18)
        at Object.<anonymous> (D:\node_apps\mongo1\app.js:9:15)
        at Module._compile (internal/modules/cjs/loader.js:1072:14)
        at Object.Module._extensions..js (internal/modules/cjs/loader.js:1101:10)
        at Module.load (internal/modules/cjs/loader.js:937:32)
        at Function.Module._load (internal/modules/cjs/loader.js:778:12)
        at Module.require (internal/modules/cjs/loader.js:961:19) {
      code: 'MODULE_NOT_FOUND',
      requireStack: [
        'D:\\node_apps\\mongo1\\app.js',
        'D:\\node_apps\\mongo1\\bin\\www'
      ]
    }
    npm ERR! code ELIFECYCLE
    npm ERR! errno 1
    npm ERR! [email protected] start: `node ./bin/www`
    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\emi\AppData\Roaming\npm-cache\_logs\2021-11-23T17_18_24_504Z-debug.log
    PS D:\node_apps\mongo1>
    PS D:\node_apps\mongo1> 

अपने स्रोत कोड देख रहा है इस प्रकार है :

Database.js

var mongoose = require('mongoose');
mongoose.connect('mongodb+srv://admin:****@cluster0.cqryc.mongodb.net/test', {useNewUrlParser: true});

var conn = mongoose.connection;
conn.on('connected',function(){
    console.log('Connected');  
});

module.exports = conn;

userModel.js

var db = require('../database');
var mongoose = require('mongoose');
var Schema = mongoose.Schema;

var BookSchema = new Schema({
    title : String,
    author : String,
    category : String,
});

module.exports = mongoose.model('Book',BookSchema);

users.js

var express = require('express');
var router = express.Router();
var Book = require('../models/book');


router.get('/', function(req, res) {
  Book.find({}).exec(function(err,books){
    if(err){
      res.send('error occured');
    }else{
      res.json(books);
    }
     });
});

router.get('/:id', function(req, res) {
  Book.findOne({
    _id : req.params.id
  }).exec(function(err,books){
    if(err){
      res.send('error occured');
    }else{
      res.json(books);
    }
     });
});


router.post('/',function(req,res){
  var newBook = new Book();
  newBook.title = req.body.title;
  newBook.author = req.body.author;
  newBook.category = req.body.category;
  newBook.save(function(err,book){
    if(err){
      res.send('error saving book');
    }else{
      res.send(book);
    }
  })
})

module.exports = router;

और App.js

var createError = require('http-errors');
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var logger = require('morgan');

var indexRouter = require('./routes/index');
var usersRouter = require('./routes/users');
const books = require('./routes/books');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'ejs');

app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', indexRouter);
app.use('/users', usersRouter);
app.use('/books', books);

// catch 404 and forward to error handler
app.use(function(req, res, next) {
  next(createError(404));
});



// error handler
app.use(function(err, req, res, next) {
  // set locals, only providing error in development
  res.locals.message = err.message;
  res.locals.error = req.app.get('env') === 'development' ? err : {};

  // render the error page
  res.status(err.status || 500);
  res.render('error');
});


app.use((err, req, res, next) => {
  // console.log(err);
  err.statusCode = err.statusCode || 500;
  err.message = err.message || "Internal Server Error";
  res.status(err.statusCode).json({
    message: err.message,
  });
});

module.exports = app;

मैं क्या कर रहा हूँ गलत? कृपया मुझे मार्गदर्शन की जरूरत है । मैं कोशिश कर रहा हूँ प्राप्त करने के लिए यह काम करने के लिए, बस लापता बातें यहाँ.