3

I have a global object defined like this:

var userDatabase = {};

In my application, I am trying to register new users. This is what my function looks like:

function register(req, res){
    var username = req.body.username;
    var obj= {count: 0,
              password:req.body.password};

    //if user is already in the database
    if(userDatabase.hasOwnProperty(username)){
        res.redirect("/?error=User has already registered");
    }
    //store user, redirect to home page
    else{
        userDatabase[username] = obj;
        console.log("added new user: ", username, "with properties: ",     userDatabase[username]);
        //redirect to homepage
        res.redirect("/");  
    }
}

My problem is that I don't believe that saying :

userDatabase[username] = obj;

is actually adding my newly registered user into my object because when I print out to my console, it says that my username is undefined.

How can I properly store my username in my object? Thanks!

Edit: I should add that I can only register one user with this code, when I try to register a second user, it presents the "user has already registered" error... which makes me REALLy believe that my object is not doing what I want it to do

This is my console log when I print out the value of userDatabase[username] before and after the if/else statement:

Express server listening on port 3000
before if/else:  undefined
added new user:  undefined with properties:  { count: 0, password: 'abc' }
after if/else:  { count: 0, password: 'abc' }
POST /register 302 11ms - 58b
GET / 200 226ms - 803b
GET /libs/jquery/jquery.min.js 304 5ms
GET /libs/bootstrap/css/bootstrap.min.css 304 4ms
GET /stylesheets/style.css 200 55ms - 110b
before if/else:  { count: 0, password: 'abc' }
after if/else:  { count: 0, password: 'abc' }
POST /register 302 2ms - 126b
GET /?error=User%20has%20already%20registered 200 27ms - 861b
GET /libs/jquery/jquery.min.js 304 2ms
GET /libs/bootstrap/css/bootstrap.min.css 304 1ms
GET /stylesheets/style.css 304 2ms

There is something very wrong here - not recognizing new user I have tried to add

EDIT 2:

when I try to access the userDatabase[username] in another function in the same file, it is not able to verify that the userDatabase{} has this user stored in it.This is how I am trying to access it:

function login(req, res) {
    var username = req.body.username;
    var password = req.body.password;
    req.session.username = username;
    req.session.password = password;    
    loggedInUsers[username] = LoggedIn;
    //when login button is pressed
    if(userDatabase.hasOwnProperty(username) ){
            storedPassword = userDatabase[username].password;
        if (storedPassword === password){
            //check for correct password
            userDatabase[username].count++;
            console.log("Count: ", userDatabase[username].count);
            res.redirect("/users");
        }
    }
    else{
        res.redirect("/?error=Invalid username/password");
    }
}

and the console output after registering and then trying to log in:

Express server listening on port 3000
before if/else:  undefined
added new user:  undefined with properties:  { count: 0, password: 'abc' }
after if/else:  { count: 0, password: 'abc' }
POST /register 302 11ms - 58b
GET / 200 232ms - 803b
GET /libs/jquery/jquery.min.js 304 6ms
GET /libs/bootstrap/css/bootstrap.min.css 304 6ms
GET /stylesheets/style.css 200 69ms - 110b
POST /login 302 2ms - 122b
GET /?error=Invalid%20username/password 302 1ms - 68b
GET /users 200 22ms - 430b
GET /libs/jquery/jquery.min.js 304 2ms
GET /libs/bootstrap/css/bootstrap.min.css 304 3ms
GET /stylesheets/style.css 304 1ms
4

2 に答える 2

1

ユーザー名は保存されていると思いますが、オブジェクトには保存されておらず、キー自体に保存されています。これを示す簡単なノード コンソール テストを次に示します。

zlatko@zlatko-desktop ~/projects/node-app $ node
> var userDB = {};
undefined
> var username = 'tester';
undefined
> userDB[username] = {count: 0, password: 'myPass'};
{ count: 0, password: 'myPass' }
> userDB;
{ tester: { count: 0, password: 'myPass' } }
> userDB[username];
{ count: 0, password: 'myPass' }
> userDB.tester
{ count: 0, password: 'myPass' }
> userDB.hasOwnProperty('tester');
true
>

したがって、オブジェクトは実際に保存されます。心に浮かぶことの 1 つは、データベースが思ったほどグローバルではないか、永続的ではないということです。アプリを実行するたびに作成しますか、それともリクエストを実行するたびに作成しますか?

また、ヒント。この種のものには、passport.js のようなものを心からお勧めします。これは至福であり、これらすべてを解決し、req.isAuthenticated()やreq.userなどの優れたプロパティとメソッドをreqオブジェクトに追加します。

于 2013-10-16T22:22:42.870 に答える
1

さて、リダイレクトは何をしていますか？リダイレクトすると、情報が失われます。また、試してみてください

console.log("added new user: ", username, "with properties: ",     JSON.stringify(userDatabase[username]));
于 2013-10-16T22:21:25.690 に答える