Getting the relational hierarchy of a mongo embedded document

gistfile1.rb

module EmbeddedSearch
  def self.included(base) # :nodoc:
    base.extend ClassMethods
  end

  module ClassMethods
    def hierarchy
      value = ""
      klass = self
      while klass.embedded?
        klass = klass.relations.select do |k,v|
          v.relation == Mongoid::Relations::Embedded::In
        end.first.first
        value += klass + "."
        klass = klass.classify.constantize
        value += 's' if klass.embedded?
      end
      value += self.to_s.downcase + "s"
    end
  end
end