试图弄清楚我应该使用什么样的关系

Question

辛纳特拉，Mongoid 3

有 4 个模型：User, Book, FavoriteBooks, ReadBooks, NewBooks。每个用户都有自己的最爱、阅读和新书列表。一本书属于一个列表。但也可以请求任何书籍的信息，这意味着书籍不应不嵌入到FavoriteBooks, ReadBooks, NewBooks。

方案部分：

class Book
 include Mongoid::Document
 belongs_to :favourite_books
 belongs_to :read_books
 belongs_to :new_books 
end

class FavoriteBook
 include Mongoid::Document
 has_many :books
end

#.... the same for ReadBooks and NewBooks


class User
 include Mongoid::Document
 # what else?
end

我好像错过了什么。

我应该怎么做才能让用户“包含”FavoriteBooks, ReadBooks, NewBooks 的列表？我应该使用一对一的关系吗？

Answer 1

我认为你应该重新考虑你的建模。恕我直言，它应该是 book 和 user 作为模型，并且 favorite_books、read_books 和 new_books 都应该是这样的关系：

class User
 include Mongoid::Document
 has_many :favorite_books
 has_many :read_books
 has_many :new_books

 has_many :books, :through => :favorite_books
 has_many :books, :through => :read_books
 has_many :books, :through => :new_books
end

class Book
 include Mongoid::Document
 has_many :favorite_books
 has_many :read_books
 has_many :new_books

 has_many :users, :through => :favorite_books
 has_many :users, :through => :read_books
 has_many :users, :through => :new_books 
end

class FavoriteBook
 include Mongoid::Document
 belongs_to :books
 belongs_to :users
end

#.... the same for ReadBooks and NewBooks

我认为这应该是一个更好的方法。 =)