educoder/app/models/competition.rb

class Competition < ApplicationRecord

  has_many :competition_modules, dependent: :destroy
  has_many :unhidden_competition_modules, -> { where(hidden: false) }, class_name: 'CompetitionModule'

  has_many :competition_stages, dependent: :destroy
  has_many :competition_stage_sections, dependent: :destroy
  has_one :current_stage_section, -> { where('end_time > NOW()') }, class_name: 'CompetitionStageSection'

  has_many :competition_teams, dependent: :destroy
  has_many :team_members, dependent: :destroy

  has_many :competition_staffs, dependent: :destroy
  has_one :teacher_staff, -> { where(category: :teacher) }, class_name: 'CompetitionStaff'
  has_one :member_staff, -> { where.not(category: :teacher) }, class_name: 'CompetitionStaff'

  has_many :attachments, as: :container

  after_create :create_competition_modules

  # 是否上架
  def published?
    status?
  end

  # 报名是否结束
  def enroll_ended?
    enroll_end_time.blank? || enroll_end_time < Time.now
  end

  # 是否已经报名
  def enrolled?(user)
    team_members.exists?(user_id: user.id)
  end

  # 是否禁止教师报名
  def teacher_enroll_forbidden?
    teacher_staff.blank? || teacher_staff.maximum.zero?
  end

  # 是否禁止学生报名
  def member_enroll_forbidden?
    member_staff.blank? || member_staff.maximum.zero?
  end

  # 老师是否能多次报名
  def teacher_multiple_limited?
    teacher_staff.mutiple_limited?
  end

  # 队员是否能多次报名
  def member_multiple_limited?
    member_staff.mutiple_limited?
  end

  private

  def create_competition_modules
    CompetitionModule.bulk_insert(*%i[competition_id name position]) do |worker|
      %w(首页 报名 通知公告 排行榜 资料下载).each_with_index do |name, index|
        worker.add(competition_id: id, name: name, position: index + 1)
      end
    end
  end
end