Create New User with Passport-Local using MongoDB and Node.JS

Question

Here's the code for a new user:

var User = mongoose.model('User', userSchema);
var usr = new User({ username: 'bob', email: '[email protected]', password: 'secret' });

Here's the code for checking login.

passport.use(new LocalStrategy(function(username, password, done) {
  User.findOne({ username: username }, function(err, user) {
    if (err) { return done(err); }
    if (!user) { return done(null, false, { message: 'Unknown user ' + username }); }
    user.comparePassword(password, function(err, isMatch) {
      if (err) return done(err);
      if(isMatch) {
        return done(null, user);
      } else {
        return done(null, false, { message: 'Invalid password' });
      }
    });
  });
}));

If the username doesn't exist, it says "Unknown user __________"

Instead of saying unknown user, I want to create a new user in the database. How do I modify this code to do that?

I'd like to create a new user with the login info they entered if that login name doesn't already exist.

Update

I'm trying this and it's not working. bob5 isn't saving to the database.

passport.use(new LocalStrategy(function(username, password, done) {
  User.findOne({ username: username }, function(err, user) {
    if (err) { return done(err); }
 if (!user) { usr = new User({ username: 'bob5', email: '[email protected]', password: 'secret' });
usr.save(function(err) {
  if(err) {
    console.log(err);
  } else {
    console.log('user: ' + usr.username + " saved.");
  }
});

If I type this, bob99 gets saved to the database. So I can create a user... I just need to pass the arguments to it within the if statement (I think).

usr = new User({ username: 'bob99', email: '[email protected]', password: 'secret' });
usr.save(function(err) {
  if(err) {
    console.log(err);
  } else {
    console.log('user: ' + usr.username + " saved.");
  }
});

I don't know how to do the "new User" command where it says return done. Can you please show me the proper syntax? I'll give you an upvote :) — Tyler Langan
– Tyler Langan, Commented Oct 26, 2013 at 5:46

Vardan · Accepted Answer · 2013-10-28 07:34:59Z

7

passport.use(new LocalStrategy(function(username, password, done) {

  User.findOne({ username: username }, function(err, user) {

    if (err) { return done(err); }

    if (!user) { 
         usr = new User({ username: 'bob99', email: '[email protected]', password: 'secret' });
         usr.save(function(err) {
         if(err) {
               console.log(err);
         } else {
               console.log('user: ' + usr.username + " saved.");
         }
      });

    }

    user.comparePassword(password, function(err, isMatch) {
      if (err) return done(err);
      if(isMatch) {
        return done(null, user);
      } else {
        return done(null, false, { message: 'Invalid password' });
      }
    });
  });
}));

edited Oct 28, 2013 at 7:34

answered Oct 26, 2013 at 11:56

Vardan

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2 Comments

Tyler Langan Over a year ago

Thanks, Vardan! Can you please include the code to create the user? I'm not exactly sure how to pass the arguments/parameters.

Vardan Over a year ago

In your above updated code where you are trying to save bob5, parenthesis are not properly closed. Check them.

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