needs_more_elqouence.rb

def self.save_recurring_tasks(tasks)
  transaction = ActiveRecord::Base.transaction do
    tasks.each_with_index do |task, index|
      if index == 0
        base_id = nil
      end

      task.base_task_id = base_id

      task.save

      if index == 0
        base_id = task.id
      end
    end
  end

  transaction
end

transaction = ActiveRecord::Base.transaction do
  base_id = nil

  tasks.each do |task|
    task.base_task_id = base_id
    task.save

    base_id ||= task.id
  end
end