Node>Expressjs res.render not redirecting - node.js

Question

I am developing application with nodejs and express. I have login page. I am posting user data and if there is no user with that data then i want to redirect page. But res.render not working(I added comment where res.render is in my code like "//Redirect if user not found". Have no idea. Here is my code:
var mongoose = require('mongoose');
mongoose.connect("mongodb://localhost/fuatblog");
var UserSchema = new mongoose.Schema({
name: String,
email: String,
password: String,
age: Number
}),
Users = mongoose.model('Users', UserSchema);
app.post('/sessions', function (req, res) {
console.log(req.body.user.email);
console.log(req.body.user.password);
Users.find({
email: req.body.user.email,
password: req.body.user.password
}, function (err, docs) {
if (! docs.length) {
// no results...
console.log('User Not Found');
//res.status(400);
//Redirect if user not found
return res.render(__dirname + "/views/login", {
title: 'Giriş',
stylesheet: 'login',
error: 'Email or password is wrong.'
});
}
console.log('User found');
req.session.email = docs[0].email;
console.log(req.session.email);
});
return res.redirect('/Management/Index');
});

Answer 1

The .render method which you want to be invoke when the user is not recognized is in async code. This means that the return res.redirect('/Management/Index'); is called once the request reaches your server. But you should do that once you get the result from Users.find. I.e.:
app.post('/sessions', function (req, res) {
console.log(req.body.user.email);
console.log(req.body.user.password);
Users.find({
email: req.body.user.email,
password: req.body.user.password
}, function (err, docs) {
if (! docs.length) {
// no results...
console.log('User Not Found');
//res.status(400);
//Redirect if user not found
return res.render(__dirname + "/views/login", {
title: 'Giriş',
stylesheet: 'login',
error: 'Email or password is wrong.'
});
}
console.log('User found');
req.session.email = docs[0].email;
console.log(req.session.email);
return res.redirect('/Management/Index');
});
});