gistfile1.rb

module EventMessage
  def self.include(klass)
    klass.instance_eval do
      include Mongoid::Document
      
      field :uid, as: :user_id
      field :et, as: :event_type, type: Integer
      field :emd, as: :event_metadata, type: Hash
      field :ts, as: :timestamp, type: Integer, default: Time.now.to_i
      
      belongs_to :user, foreign_key: :uid, index: true
    end
  end

  def message_object
    ...
  end
  
  def message
    ...
  end
  
  def message_text
    ...
  end
end

module EventApnSender
  def send_apns
    ...
  end
end