Structuring models directory

app/models/beathaven/favorite.rb

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+class Favorite < ActiveRecord::Base
+  belongs_to :user
+  belongs_to :artist
+  belongs_to :album
+  belongs_to :track
+end

app/models/beathaven/playlist.rb

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+class Playlist < ActiveRecord::Base
+  belongs_to :user
+  has_many :playlist_tracks
+end

app/models/beathaven/playlist_item.rb

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+class PlaylistItem < ActiveRecord::Base
+  belongs_to :playlist
+  belongs_to :track
+end

app/models/beathaven/session.rb

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+class Session < ActiveRecord::Base
+  belongs_to :user
+end

app/models/beathaven/user.rb

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+class User < ActiveRecord::Base
+  bitmask :music, :as => [:album, :single, :live, :bootleg, :soundtrack] 
+  has_one :session
+end