class Stage < ApplicationRecord
  include Searchable::Dependents::Stage

  belongs_to :subject, counter_cache: true

  has_many :stage_shixuns, -> { order("stage_shixuns.position ASC") }, dependent: :destroy
  has_many :shixuns, :through => :stage_shixuns

  validates :name, length: { maximum: 60 , too_long: "不能超过60个字符" }
  validates :description, length: { maximum: 1000, too_long: "不能超过1000个字符" }
end