Structuring models directory

app/models/music/album.rb

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+class Album < ActiveRecord::Base
+  belongs_to :artist
+  has_many :tracks, :order => 'bonus ASC, position ASC', :dependent => :destroy
+  has_many :local_brainz_releases, :class_name => 'LocalBrainz::Release', :dependent => :destroy
+end

app/models/music/album_format.rb

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+class AlbumFormat < ActiveRecord::Base
+  belongs_to :album
+  belongs_to :format
+end

app/models/music/album_genre.rb

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+class AlbumGenre < ActiveRecord::Base
+  belongs_to :album
+  belongs_to :genre
+end

app/models/music/album_style.rb

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+class AlbumStyle < ActiveRecord::Base
+  belongs_to :album
+  belongs_to :style
+end

app/models/music/artist.rb

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+class Artist < ActiveRecord::Base
+  has_many :albums, :order => 'has_pic DESC, year ASC, id ASC', :dependent => :destroy
+  has_many :artist_links, :dependent => :destroy
+  has_many :artist_aliases, :dependent => :destroy
+  has_many :tracks, :through => :track_artists
+end

app/models/music/artist_alias.rb

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+class ArtistAlias < ActiveRecord::Base
+  belongs_to :artist
+end

app/models/music/artist_link.rb

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+class ArtistLink < ActiveRecord::Base
+  belongs_to :artist
+end

app/models/music/genre.rb

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+class Genre < ActiveRecord::Base
+end

app/models/music/release_format.rb

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+class ReleaseFormat < ActiveRecord::Base
+end

app/models/music/style.rb

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+class Style < ActiveRecord::Base
+end

app/models/music/track.rb

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+class Track < ActiveRecord::Base
+  belongs_to :album
+  has_many :artists, :through => :track_artists
+end

app/models/music/track_artist.rb

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+class TrackArtist < ActiveRecord::Base
+  belongs_to :track
+  belongs_to :artist
+end