class MigrateCourseIsMd < ActiveRecord::Migration[5.2]
  def change
    # HomeworkCommon.where(homework_type: [1, 3]).where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
    # HomeworkBank.where(homework_type: [1, 3]).where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
    #
    # HomeworkCommon.where(homework_type: [1, 3]).where("created_at >= '2019-07-21 00:00:00' and homework_bank_id is not null").each do |homework|
    #
    # end
    #
    # ExerciseQuestion.where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
    # PollQuestion.where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
    # ExerciseBankQuestion.where("created_at < '2019-07-21 00:00:00'").update_all(is_md: false)
  end
end
