openSUSE/osem

# frozen_string_literal: true

class Subscription < ApplicationRecord
  belongs_to :conference
  belongs_to :user

  has_paper_trail on: %i(create destroy), ignore: [:updated_at], meta: { conference_id: :conference_id }

  validates :user_id, uniqueness: { scope: :conference_id, message: 'already subscribed!' }
end