MongoMapper Example.rb

# Stolen from: http://railstips.org/blog/archives/2009/10/09/more-mongomapper-awesomeness/

class User
  include MongoMapper::Document

  many :posts
end

class Post
  include MongoMapper::Document
  key :user_id, String
  key :title, String
end

user = User.create
user.posts.create(:title => 'Foo')

# would return post we just created
user.posts.find_by_title('Foo')