Express.js Stormpath PostRegistrationHandler - stormpath

Question

The Stormpath documentation
says nothing about modifying user attributes in the PostRegistrationHandler, and I need to be able to do this.
After creating a user, I want to give it a random string as a property. This random string will be a key into my separate Mongo Database. In my app.js, I have:
app.use(stormpath.init(app, {
postRegistrationHandler: function(account, res, next) {
// theoretically, this will give a user object a new property, 'mongo_id'
// which will be used to retrieve user info out of MONGOOOO
account.customData["mongo_id"] = "54aabc1c79f3e058eedcd2a7"; // <- this is the thing I'm trying to add
console.log("RESPNSE:\n"+res);
account.save(); // I know I'm using 'account', instead of user, but the documentation uses account. I don't know how to do this any other way
next();
console.log('User:\n', account, '\njust registered!');
},
apiKeyId: '~/.stormpath.apiKey.properties',
//apiKeySecret: 'xxx',
application: ~removed~,
secretKey: ~removed~,
redirectUrl: '/dashboard',
enableAutoLogin: true
}));
I don't know how to my console.log line DOES print out customData with the mongo_id attribute. When I try to access it later with req.user.customData['mongo_id'], it isn't there. Account and req.user must be different. How can I save the user?

Answer 1

I'm the author of the library mentioned above, so I think this will help a bit.
I've modified your code to work properly =)
app.use(stormpath.init(app, {
postRegistrationHandler: function(account, res, next) {
// The postRegistrationHandler is a special function that returns the account
// object AS-IS. This means that you need to first make the account.customData stuff
// available using account.getCustomData as described here:
// http://docs.stormpath.com/nodejs/api/account#getCustomData
account.getCustomData(function(err, data) {
if (err) {
return next(err);
} else {
data.mongo_id = '54aabc1c79f3e058eedcd2a7';
data.save();
next();
}
});
},
apiKeyId: 'xxx',
apiKeySecret: 'xxx',
application: ~removed~,
secretKey: ~removed~,
redirectUrl: '/dashboard',
enableAutoLogin: true,
expandCustomData: true, // this option makes req.user.customData available by default
// everywhere EXCEPT the postRegistrationHandler
}));
Hope that helps!

Answer 2

The solution provided by rdegges is not entirely correct.
The call to next() must be invoked only after the customData finished saving, not right away, so it has to be the callback in data.save().
Also, apparently the postRegistrationHandler parameters have changed since to account, req, res, next.
Here is a currently working solution:
postRegistrationHandler: function(account, req, res, next) {
account.getCustomData(function(err, data) {
if (err)
return next(err);
data.mongo_id = '54aabc1c79f3e058eedcd2a7';
data.save(next);
});
},