db/migrate/20150420210728_add_ptype_to_participants.rb


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class AddPtypeToParticipants < ActiveRecord::Migration[4.2]
  def self.up
    add_column :participants, :ptype, :string
    assign_participant_type
  end

  def self.down
    remove_column :participants, :ptype
  end

private

  def self.assign_participant_type
    Participant.all.each do |p|
      case
        when p.mainparticipant? then  p.ptype= Participant::TYPE[:main]
        when p.subparticipant? then  p.ptype= Participant::TYPE[:sub]
        when p.anonymousparticipant? then  p.ptype= Participant::TYPE[:anonym]
      end
      p.save!
    end
  end
end