您如何对出版物（文章，书籍，章节等）的引用和引文建模？
出版物可以是文章，书籍或一章，并且具有对其他出版物的许多引用，并且其他出版物也引用了该出版物（称这些引用）
我需要能够列出出版物之间的关系：出版物中的引用以及其他出版物对该出版物的引用
我的最初理解是，这将是处理不同类型出版物的多态关系，并且需要双向自我连接。
我的刺
Publication belongs_to :writing, :polymorphic =>true has_and_belongs_to_many :references :class_name => "Publication" :join_table => 'reference_citation' :foreign_key => 'reference_id' :foreign_key => 'citation_id' Book, Chapter, Article all have: has_many :publications :as =>writing
我觉得这有点令人困惑，因此任何有助于澄清它的建议都将是很棒的。甚至对象和字段的命名建议。
我可能还需要使用很多方法，因为我需要破坏关系的能力
这是一个使用单表继承的自引用关系的解决方案。使用以下命令创建应用程序：
$ rails myproject $ cd myproject $ script/generate model publication type:string name:string $ script/generate model citation publication_id:integer reference_id:integer
以这种方式设置关系：
class Publication < ActiveRecord::Base has_many :citations has_many :cited_publications, :through => :citations, :source => :reference has_many :references, :foreign_key => "reference_id", :class_name => "Citation" has_many :refered_publications, :through => :references, :source => :publication end class Citation < ActiveRecord::Base belongs_to :publication belongs_to :reference, :class_name => "Publication" end class Article < Publication end class Book < Publication end class Chapter < Publication end
现在，我们可以创建数据库并从控制台中尝试它：
$ rake db:migrate $ script/console Loading development environment (Rails 2.2.2) >> a = Article.create!(:name => "Article") => #<Article id: 1, ...> >> b = Book.create!(:name => "Book") => #<Book id: 2, ...> >> a.citations.create(:reference => b) => #<Citation id: 1, publication_id: 1, reference_id: 2, created_at: "2009-02-15 14:13:15", updated_at: "2009-02-15 14:13:15"> >> a.citations => [#<Citation id: 1, ...>] >> a.references => [] >> b.citations => [] >> b.references => [#<Citation id: 1, publication_id: 1, reference_id: 2, created_at: "2009-02-15 14:13:15", updated_at: "2009-02-15 14:13:15">] >> a.cited_publications => [#<Book id: 2, type: "Book", name: "Book", created_at: "2009-02-15 14:11:00", updated_at: "2009-02-15 14:11:00">] >> a.refered_publications => [] >> b.cited_publications => [] >> b.refered_publications => [#<Article id: 1, type: "Article", name: "Article", created_at: "2009-02-15 14:10:51", updated_at: "2009-02-15 14:10:51">]
