Question

考虑一下：

class User < ActiveRecord::Base
  # name, email, password
end

class Article < ActiveRecord::Base
  # user_id, title, text
end

class Favorites < ActiveRecord::Base
  # user_id, article_id
end

如何以@ user.articles（用户创建的文章）和@ user.favorite_articles（收藏模型中最喜欢的文章）的方式将所有这些组合在一起

提前致谢！

Answer 1

如果我理解你想要的东西，我会说

class User < ActiveRecord::Base
  has_many :articles
  has_many :favorite_articles, :through => :favorites, :source => :article
end

class Article < ActiveRecord::Base
  has_and_belongs_to_many :user
end

class Favorites < ActiveRecord::Base
  has_and_belongs_to_many :user
  has_one :article
end

编辑：添加了favorite_articles

Answer 2

您可以使用has_many :through关联从用户那里获取喜爱的文章。您还可以使用它来获取喜欢给定文章的用户。

class User < ActiveRecord::Base
  has_many :articles
  has_many :favorites
  has_many :favorite_articles, :through => :favorites, :source => :article
end

class Article < ActiveRecord::Base
  belongs_to :user
  has_many :favorites
  has_many :favorited_by_users, :through => :favorites, :source => :user
end

class Favorite < ActiveRecord::Base
  belongs_to :article
  belongs_to :user
end

简单表关系

2 个答案: