Question

Sinatra，Mongoid 3

有4个模型：User, Book, FavoriteBooks, ReadBooks, NewBooks。每个用户都有他们的收藏夹，阅读和新书的列表。一本书属于一个列表。但也可以要求提供有关任何书籍的信息，这些书籍应该不嵌入FavoriteBooks, ReadBooks, NewBooks。

该计划的一部分：

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

好像我错过了什么。

如何让用户“包含”FavoriteBooks, ReadBooks, NewBooks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，它应该是书籍和用户作为模型，而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

我认为这应该是更好的方法。 =）

试图弄清楚我应该使用什么样的关系

1 个答案: