Simple Mongoid associations

I'm just starting with Mongodb using Mongoid in Rails and I'm wondering how to create the simple associations between these three models:

User which has many Photos which has many Tags which has many Photos…

I don't want to embed any of th开发者_JAVA技巧e models since I want to be able to present a list of for instance all Photos or all Tags in certain views…

Thanks!

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Check out the Mongoid Docs on Associations. Look under "RELATIONAL ASSOCIATIONS"

class User
  include Mongoid::Document 
  references_many :photos
end

class Photos
  include Mongoid::Document
  referenced_in :user
end