class Track < ActiveRecord::Base
  belongs_to :album
  has_many :track_artists
  has_many :artists, :through => :track_artists
  @duration
  
  def duration
    if self.length
      time = self.length
      time_m = (time / 60).floor
      time_s = time - time_m * 60
      time_m.to_s + ':' + (time_s < 10 ? '0' : '') + time_s.to_s
    else
      '0:00'
    end
  end
end