El siguiente código es un middleware utilizado para crear la propiedad req.user que contiene el obj del usuario si existe req.session.user. Sin embargo, por alguna razón, nunca entra en el middleware. Entonces 'hihihhiihi' tampoco se imprime.

 // have middleware that deserializes the logged in user // if req.session.user exists, then create property req.user that contains the user obj app.use(async (req, res, next) => { console.log('hihihhiihi'); if(req.session.username) { console.log(req.session.username,' is abcdefg'); req.user = await User.findOne({username: req.session.username}).exec(); } next(); });

Esta es mi aplicación.js

 import bodyParser from 'body-parser'; import mongoose from 'mongoose'; import cors from 'cors'; import diaryRoutes from './routes/diarys.js'; import userRoutes from './controllers/user.js' const app = express(); // app.use(express.urlencoded({ extended: false })); app.use(bodyParser.json({ limit: '30mb', extended: true })) app.use(bodyParser.urlencoded({ limit: '30mb', extended: true })) app.use(cors()); import session from 'express-session'; // after login, don't have to enter username and pw again // ...so sessions const sessionOptions = { secret: 'secret for signing session id', saveUninitialized: false, resave: false }; app.use(session(sessionOptions)); app.use((req, res, next) => { console.log('session contains', req.session); next(); }); // have middleware that deserializes the logged in user // if req.session.user exists, then create property req.user that contains the user obj app.use(async (req, res, next) => { console.log('hihihhiihi'); if(req.session.username) { console.log(req.session.username,' is abcdefg'); req.user = await User.findOne({username: req.session.username}).exec(); } next(); }); app.use('/diarys', diaryRoutes); app.use('/users', userRoutes); const CONNECTION_URL = 'someurl'; const PORT = process.env.PORT || 5000; mongoose.connect(CONNECTION_URL, { useNewUrlParser: true, useUnifiedTopology: true }) .then(() => app.listen(PORT, () => console.log(`Server Running on Port ${PORT}`))) .catch((error) => console.log(`Error message(can't connect): ${error}`));