Meteor onCreateUser issue - meteor

Question

I am using Meteor and people can connect to the site via Facebook. I'm using people username to identify them. But, some of them don't have a username. For example, a new user has null as a username. What I'm trying to do is, if the person has a username then OK we use their username. If not, I wanna use their Facebook id as their username. The problem is, my if condition is not working properly. If the person has a username, the if condition considers that the person doesn't. The weird thing is, if I do a console.log of the username before the if condition, it will show the username. But once in the if, it considers that the username is null. Here is the code :
Accounts.onCreateUser(function(options, user) {
var fb = user.services.facebook;
var token = user.services.facebook.accessToken;
if (options.profile) {
options.profile.fb_id = fb.id;
options.profile.gender = fb.gender;
options.profile.username = fb.username
console.log( 'username : ' + options.profile.username);
if ( !(options.profile.username === null || options.profile.username ==="null" || options.profile.username === undefined || options.profile.username === "undefined")) {
console.log('noooooooo');
options.profile.username = fb.id;
} else {
console.log('yessssssss');
options.profile.username = fb.username;
}
options.profile.email = fb.email;
options.profile.firstname = fb.first_name;
user.profile = options.profile;
}
sendWelcomeEmail(options.profile.name, options.profile.email);
return user;
});
With this code, if I log in with my Facebook that has a username. The condition will show 'noooooooo' but the console.log( 'username : ' + options.profile.username); will show my username. Why does it do that? :l

Answer 1

It's because creating is called before logging and logging is asynchronous .. so you cannot ensure that your if will be or will not true/false. Your putting information from fb service is redundant, because all these informations are already saved with user.
http://docs.meteor.com/#meteor_user
You should obtain information about user after he is loggedIn because in that moment you will be able to recognise what kind of identifier you can use username/id.
//Server side
Meteor.publish("userData", function () {
return Meteor.users.find({_id: this.userId});
// You can publish only facebook id..
/*return Meteor.users.find({_id: this.userId},
{
fields: {
'services.facebook.id': true
}
}
);*/
});
//Client side
Meteor.subscribe("userData");
// .. you can see more informations about logged user
console.log(Meteor.users.find({}).fetch());