class Album < ActiveRecord::Base
  belongs_to :artist
  has_many :tracks, :conditions => ['position > 0'], :order => 'bonus ASC, position ASC', :dependent => :destroy
  has_many :album_formats
  has_many :release_formats, :through => :album_formats
  
  default_scope where(:master => true)
  after_save :clear_artist_cache
  
  def self.with_format f
    joins(:release_formats).where(:release_formats => { :hash => f.to_s })
  end
  
  def serialize
    {
      name: name,
      pic_url: pic_url,
      year: year,
      tracks: tracks.map(&:serialize)
    }
  end
  
private

  def clear_artist_cache
    artist.clear_cache
  end
end