node.js - Use multiple local strategies in PassportJS

Question

I'm trying to use multiple LOCAL strategies with PassportJS. I'm not trying to use local, facebook, and gmail, etc. I have two sets of users stored in separate objects and I want to use a local strategy to authenticate both. As it stands, I cannot use the same local strategy for both because they have different object properties which has me querying different objects. Is there any way to do this? OR any suggestions around this would be greatly appreciated.

Answer 1

You can name your local strategies to separate them.

// use two LocalStrategies, registered under user and sponsor names

      // add other strategies for more authentication flexibility
  passport.use('user-local', new LocalStrategy({
      usernameField: 'email',
      passwordField: 'password' // this is the virtual field on the model
    },
    function(email, password, done) {
      User.findOne({
        email: email
      }, function(err, user) {
        if (err) return done(err);

        if (!user) {
          return done(null, false, {
            message: 'This email is not registered.'
          });
        }
        if (!user.authenticate(password)) {
          return done(null, false, {
            message: 'This password is not correct.'
          });
        }
        return done(null, user);
      });
    }
  ));

    // add other strategies for more authentication flexibility
    passport.use('sponsor-local', new LocalStrategy({
            usernameField: 'username',
            passwordField: 'password' // this is the virtual field on the model
        },
        function(username, password, done) {
            Sponsor.findOne({
                'primaryContact.username': username
            }, function(err, sponsor) {
                if (err) return done(err);

                if (!sponsor) {
                    return done(null, false, {
                        message: 'This email/username is not registered.'
                    });
                }
                if (!sponsor.authenticate(password)) {
                    return done(null, false, {
                        message: 'This password is not correct.'
                    });
                }
                return done(null, sponsor);
            });
        }
    ));

Later controller code refer to them by name.

/**
 * User Login
 */
exports.loginUser = function (req, res, next) {
    passport.authenticate('user-local', function(err, user, info) {
        var error = err || info;
        if (error) return res.json(401, error);

        req.logIn(user, function(err) {

            if (err) return res.send(err);
            res.json(req.user.userInfo);
        });
    })(req, res, next);
};

/**
 * Sponsor Login
 */
exports.loginSponsor = function (req, res, next) {
    passport.authenticate('sponsor-local', function(err, sponsor, info) {
        var error = err || info;
        if (error) return res.json(401, error);

        req.logIn(sponsor, function(err) {
            if (err) return res.send(err);
            res.json(req.sponsor.profile);
        });
    })(req, res, next);
};

Later when it comes time to serialize you user, you may want to do something like this.

// serialize
passport.serializeUser(function(user, done) {            
  if (isUser(user)) {
    // serialize user
  } else if (isSponsor(user)) {
    // serialize company
  }
});