req.checkBody is not a function with Express-Validator NODEJS - node.js

Question

Hi I'm trying doing a login page, after clicking on submit I'm getting this error with express-validator version 5.3.1
req.checkBody is not a function
TypeError: req.checkBody is not a function
at Strategy._verify (C:\Users\aless\Desktop\js_cart-master\config\passport.js:67:7)
at Strategy.authenticate (C:\Users\aless\Desktop\js_cart-master\node_modules\passport-local\lib\strategy.js:90:12)
at attempt (C:\Users\aless\Desktop\js_cart-master\node_modules\passport\lib\middleware\authenticate.js:369:16)
at authenticate (C:\Users\aless\Desktop\js_cart-master\node_modules\passport\lib\middleware\authenticate.js:370:7)
at Layer.handle [as handle_request] (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\route.js:137:13)
at Route.dispatch (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\layer.js:95:5)
at C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\index.js:281:22
at Function.process_params (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\index.js:335:12)
at next (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\index.js:275:10)
at C:\Users\aless\Desktop\js_cart-master\routes\user.js:39:3
at Layer.handle [as handle_request] (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\layer.js:95:5)
at trim_prefix (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\index.js:317:13)
at C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\index.js:284:7
at Function.process_params (C:\Users\aless\Desktop\js_cart-master\node_modules\express\lib\router\index.js:335:12)
In my app.js I have required express-validator with const validator = require('express-validator');//#5.3.1
and used it with app.use(validator());
const createError = require('http-errors');
const express = require('express');
const path = require('path');
const cookieParser = require('cookie-parser');
const logger = require('morgan');
const mongoose = require('mongoose');
const passport =require('passport');
const flash = require('connect-flash');
const bcrypt = require('bcrypt');
const validator = require('express-validator');//#5.3.1
const session = require('express-session');
const MongoStore = require('connect-mongo');
const env = require('dotenv').config()
const app = express();
mongoose.connect(process.env.URI,{ useNewUrlParser: true });
require('./config/passport');
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'hbs');
app.use(logger('dev'));
app.use(express.json());
app.use(express.urlencoded({ extended: false }));
app.use(validator());
app.use(cookieParser());
app.use(session({
secret: "key per i cookie",
saveUninitialized: false,
resave: false,
store: MongoStore.create({
mongoUrl: process.env.URI,
autoRemove: 'disabled'
}),
cookie: { maxAge:30000,secure:false }
}));
app.use(flash());
app.use(passport.initialize());
app.use(passport.session());
app.use(express.static(path.join(__dirname, 'public')));
//verify if authenticated
app.use((req, res, next)=>{
res.locals.login =req.isAuthenticated();
//access sessions through templates
res.locals.session = req.session;
next();
});
//routes
app.use('/', require('./routes/index'));
app.use('/user', require('./routes/user'));
// 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');
});
module.exports = app;
Using this express-validator version I got this error when submit, using last express-validator version I get same error in console.
Why I'm getting this error??

Answer 1

The reason is the way you are requiring it.
const { body, validationResult } = require('express-validator');
In your code you can make these changes and try:
const { validationResult } = require('express-validator');//#5.3.1
.
.
.
app.use(validationResult());
Note: check this link for more information.