你将如何模型中轨与放大器的参考和引用的文章; ActiveRecord的？ [英] How would you model articles with references and citations in rails & ActiveRecord?

问题描述

这是一篇文章都有它指的是和许多其他文章可以参考了很多文章。有时候一篇文章可以参考的一篇文章还提到了它。

An article has many articles that it refers to and many other articles can refer to it. Sometimes an article can refer to an article that also refers to it.

推荐答案

我会做这样的：

class Article < ActiveRecord::Base
  # mentions in other articles
  has_many :references, :foreign_key => 'referred_article_id'
  # articles that refer to it
  has_many :referrers, :through => :references, :foreign_key => 'referred_article_id'
  # articles it refers to
  has_many :referred_articles, :through => :references, :foreign_key => 'referrer_id'
end

class Reference < ActiveRecord::Base
  belongs_to :referrer, :class => Article
  belongs_to :referred_article, :class => Article
end

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