BSONObjectID validation in getById

[Fruzenshtein]

Hey I just overviewed your application, it's really nice.

What about validation of BSONObjectID here:

https://github.com/sgodbillon/reactivemongo-demo-app/blob/master/app/controllers/Application.scala#L60

?

What if I put there not valid BSONObjectID value? E.g. dsf3223asfa

Thanks