class Serial < ActiveRecord::Base
  has_attached_file :cover
  has_many :serial_seasons, :dependent => :delete_all
  has_many :episodes, :through => :serial_seasons, :dependent => :delete_all

  validates :title, :uniqueness => true, :presence => true
  validates :description, :uniqueness => true, :presence => true
  validates :cover_file_name, :presence => true
  validates :started_at, :presence => true

def to_label
"#{title}"
end

end

class SerialSeason < ActiveRecord::Base
  belongs_to :serial
  has_many :episodes, :dependent => :delete_all

  validates :title, :presence => true
  validates :serial_id, :presence => true

def to_label
"#{title}"
end

end

class Episode < ActiveRecord::Base
  belongs_to :serial_season
  belongs_to :serial

  validates :title, :presence => true
  validates :serial_id, :presence => true
  validates :serial_season_id, :presence => true
  validates :vk_frame, :uniqueness => true, :presence => true

def to_label
"#{title}"
end

end