Possible Duplicate:
How to represent the data for threaded comments(along with comment voting) in mongodb?
I come from mysql world and have decided to learn to use mongoDB. My upcoming project will be simmilar to Reddit.com with multi level commenting and voting. Can you please guide me to a good resource to understand how to build apps using mongodb? I understand how basic document storage works, but can't wrap my head around how I would actually store tree of comments and user information in one document and have it update if someone updates their user info. So basically I am looking for a guide of migrating from mysql to mongodb.
Any advice/guidance is greatly appreciated.