atzorvas/ccradio

Missing top-level class documentation comment.
class PlaylistItem < ActiveRecord::Base
  belongs_to :stream
  validates :song, uniqueness: true, unless: :last_song_differs
  after_create :notify
 
  def notify
Do not introduce global variables.
Prefer single-quoted strings when you don't need string interpolation or special symbols.
    $redis.publish "songs", { song: self }.to_json
  end
 
  def last_song_differs
    stream.playlist_items.any? &&
      song != stream.playlist_items.last.song
  end
end