class LiveLink < ApplicationRecord
  belongs_to :course
  belongs_to :user

  has_many :tidings, as: :container, dependent: :destroy

  validates :url, presence: true, format: { with: CustomRegexp::URL, message: "必须为网址超链接" }
  validates :description, length: { maximum: 100, too_long: "不能超过100个字符" }

  def op_auth?
    user == User.current || User.current.admin?
  end
end