Cache clear hooks, track length update fix

app/models/music/album.rb

@@ -5,6 +5,7 @@ class Album < ActiveRecord::Base
   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 })
@@ -18,4 +19,10 @@ class Album < ActiveRecord::Base
       tracks: tracks.map(&:serialize)
     }
   end
+  
+private
+
+  def clear_artist_cache
+    artist.clear_cache
+  end
 end

app/models/music/artist.rb

@@ -6,6 +6,7 @@ class Artist < ActiveRecord::Base
   has_many :playlists
   
   after_initialize :prepare_description
+  after_save :clear_cache
   
   def status_str
     %w(loading ok fail)[self.status]

app/models/music/track.rb

@@ -4,6 +4,8 @@ class Track < ActiveRecord::Base
   has_many :artists, :through => :track_artists
   has_many :playlist_items
   
+  after_save :clear_artist_cache
+  
   def duration
     if self.length
       time = self.length
@@ -28,4 +30,10 @@ class Track < ActiveRecord::Base
       album_pic: album.pic_url
     }
   end
+  
+private
+
+  def clear_artist_cache
+    artists.each(&:clear_cache)
+  end
 end