module Sis
  module Core
    class Prerequisite < ApplicationRecord
      belongs_to :predecessor, foreign_key: 'predecessor_id', class_name: 'CurriculumCourse'
      belongs_to :successor, foreign_key: 'successor_id', class_name: 'CurriculumCourse'

      def predecessor_name
        predecessor.course.title.to_s
      end

      def successor_name
        successor.course.name.to_s
      end
    end
  end
end