class UpdateCourseActivity < ActiveRecord::Migration
  def up
    count = CourseActivity.all.count / 30 + 2
    transaction do
      for i in 1 ... count do i
      CourseActivity.page(i).per(30).each do |activity|
        if activity.course_act
          if activity.course_act_type == 'Poll'
            if activity.course_act.polls_status == 1
              activity.destroy
            end
          end
        else
          activity.destroy
        end
      end
      end
    end
  end

  def down
  end
end