has_many经过几次

Question

我想就我的代码提出建议，因为我不确定如何使用 has_many 槽关联。

在我的案例中，用户可以将视图标记为 Post。他们可以评论 Posts，也可以写关于 Posts 的注释。

这是我所做的：

class User 
  has_many :posts, through: post_views
  has_many :posts, through: comments
  has_many :posts, through: notes
end

class Post
  has_many :users, through: post_views
  has_many :users, through: comments
  has_many :users, through: notes
end

class PostView
  belongs_to: user
  belongs_to: post
end

class Comment
  belongs_to: user
  belongs_to: post
end

class Note
  belongs_to: user
  belongs_to: post
end

可以吗？我该怎么做才能获得更好的代码？

编辑 = Mohammad AbuShady 回答后 class 用户 has_many :post_views has_many :viewed_posts, 通过: post_views

  has_many :comments
  has_many :commented_posts, through: comments

  has_many :notes
  has_many :noted_posts, through: notes
end

class Post
  has_many :post_views
  has_many :viewer_users, through: post_views

  has_many :comments
  has_many :comments_users, through: comments

  has_many :notes
  has_many :notes_users, through: notes
end


class PostView
  belongs_to: user
  belongs_to: post
end

class Comment
  belongs_to: user
  belongs_to: post
end

class Note
  belongs_to: user
  belongs_to: post
end

可以吗？

谢谢

洛基

Answer 1

您需要与连接模型建立关系才能使 through 部分正常工作，因此

class User < ActiveRecord::Base
  has_many :post_views
  has_many :viewed_posts, through: :post_views
end
class PostView < ActiveRecord::Base
  belongs_to :posts
  belongs_to :users
end
class Post < ActiveRecord::Base
  has_many :post_views
  has_many :users, through: :post_views
end

其他两个模型也一样。

has_many经过几次

has_many through several times

activerecord

model

ruby-on-rails