trustieforge/db/migrate/20150831085920_update_memo_time.rb

class UpdateMemoTime < ActiveRecord::Migration
  def up
    memo_count = Memo.all.count / 30 + 1
    transaction do
      for i in 1 ... memo_count do i
      MemoMessage.page(i).per(30).each do |memo_message|
        if memo_message.memo
          if memo_message.memo.respond_to?("created_at")
            memo_message.created_at = memo_message.memo.created_at
          elsif memo_message.memo.respond_to?("created_on")
            memo_message.created_at = memo_message.memo.created_on
          end
          memo_message.save

          memo_messages = MemoMessage.where("message_type = '#{memo_message.class.to_s}' and message_id = '#{memo_message.id}'").first
          memo_messages.created_at = memo_message.created_at
          memo_messages.save
        end
      end
      end
    end
  end

  def down
  end
end