Userstamps

Declare userstamps! in your model to add creator and updater methods to your document. The values must be set manually like so:

class User
  include MongoMapper::Document
  
  key :name, String
end

class Post
  include MongoMapper::Document
  
  key :body, String
  userstamps!
end

u = User.create(:name => 'John')
u2 = User.create(:name => 'J-P')
p = Post.new(:body => 'Lorem ipsum etc..')
p.creator = u
p.updater = u2
p.save

Note that your users must be in a model with a class named User for this to work.

In the above example, p.creator would result in the same user as u and p.updater would result in the same user as u2.