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我有以下型号和协会:协会通过的has_many和多属于
class User < ActiveRecord::Base
has_and_belongs_to_many :songs
end
class Song < ActiveRecord::Base
has_and_belongs_to_many :users
belongs_to :album
delegate :artist, :to => :album, :allow_nil => true
end
class Album < ActiveRecord::Base
has_many :songs
belongs_to :artist
end
class Artist < ActiveRecord::Base
has_many :albums
has_many :songs, :through => :albums
end
我需要能够调用user.albums和user.artists定期。是用户和歌手/专辑之间创建has_and_belongs_to_many关联的最有效选择吗?
看起来应该有更好的方法,但我还没有找到任何东西。
哇。脑屁。谢谢 – mrabin