Express change session every request

Question

I have a function to login

app.post(\'/doLogin\', function(req,res){
        db.users.findOne({username: req.body.username}, function(err, user) {
            if         


        

Answer 1

Maybe there are some asynchronous errors in your code. Every time you have the asynchronous operation(like a callback), you should make sure that your rest code is executed after the callback function, so you may put the code into the callback function. Just like this:

db.users.findOne({username: req.body.username}, function(err, user) {
  if( err ) {
    console.log("Login fail");
  } 
  else if (user != null) {
    if (req.body.password == user.password) {
      req.session.user_role = "user";
      req.session.save();
      res.send({redirect: "/"});
    } else {
      req.session.user_role = "null";
      console.log("Wrong login");
      res.send({redirect: "/"});
    }
  }
});

And the app.get should look like:

app.get('/', function(req,res){
  redis.get('sess:' + req.session.id, function(err, result){
    console.log("Get session: " + util.inspect(JSON.parse(result),{ showHidden: true, depth: null }));
    if ((req.session.user_role == "user")) {
      console.log("Logged in");
    } else {
      console.log("Logged out");
    }
  });
});