Loopback's default deserialization

deserializer.js

passport.deserializeUser(function(id, done) {
  // DB query 1:
  // Find the user in the database
  // This is where the largest amount of data is sent
  // back form the database
  self.userModel.findById(id, function(err, user) {
    if (err || !user) {
      return done(err, user);
    }
    // DB query 2:
    // grab the identity object
    // this contains their oauth data
    // we actually don't use this information
    // anywhere in our codebase
    user.identities(function(err, identities) {
      user.profiles = identities;
      // DB query 3: grab their credentials
      // This is a mistery to me why this exist.
      // I'm glad we can get ride of this request
      user.credentials(function(err, accounts) {
        user.accounts = accounts;
        done(err, user);
      });
    });
  });
});