Node.js Model-Routes-Controllers-Services Code Structure

Example

user.model.js

var mongoose = require('mongoose')

const UserSchema  = new mongoose.Schema({
    name: String
})

const User = mongoose.model('User', UserSchema)

module.exports = User;

user.routes.js

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

var UserController = require('../controllers/user.controller')

router.get('/', UserController.getUsers)

module.exports = router;

user.controllers.js

var UserService = require('../services/user.service')    

exports.getUsers = async function (req, res, next) {
    // Validate request parameters, queries using express-validator
    
    var page = req.params.page ? req.params.page : 1;
    var limit = req.params.limit ? req.params.limit : 10;
    try {
        var users = await UserService.getUsers({}, page, limit)
        return res.status(200).json({ status: 200, data: users, message: "Succesfully Users Retrieved" });
    } catch (e) {
        return res.status(400).json({ status: 400, message: e.message });
    }
}

user.services.js

var User = require('../models/user.model')

exports.getUsers = async function (query, page, limit) {

    try {
        var users = await User.find(query)
        return users;
    } catch (e) {
        // Log Errors
        throw Error('Error while Paginating Users')
    }
}