Rails array grouping for Mongoid

grouping.rb

module Enumerable
  def in_groups_of(*args, &block)
    to_a.in_groups_of(*args, &block)
  end

  def in_groups(*args, &block)
    to_a.in_groups(*args, &block)
  end

  def split(*args, &block)
    to_a.split(*args, &block)
  end
end