NodeJS ExpressJS: Middleware [EX-13]

Middleware 

Writing Middleware

Using Middleware

/validate/user.validate.js

user.validate.js

module.exports.postCreate = function(req, res, next) {
    var errors = [];
    if (!req.body.name) {
        errors.push('Name is required.');
    }
    if (errors.length) {
        res.render('users/create', {
            errors: errors
        })
        return;
    }
    next();
}

/routes/user.route.js

user.route.js

const express = require('express')
const router = express()

var controller = require('../controller/user.controller');

var validate = require('../validate/user.validate');

// GET method route
router.get('/', controller.index);

// GET method route
router.get('/create', controller.create);

// GET by id
router.get('/:id', controller.get);

// POST create user
// Chạy validate.postCreate trước rồi mới chạy tới comtroller.postCreate thông qua method next()
router.post('/create', validate.postCreate, controller.postCreate);

// GET method route
router.get('/search/name', controller.search);

module.exports = router;

Command: npm start

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