Question

我有一个User模型，一个Book模型，一个Author模型和一个Authorship模型。用户has_many书籍，书籍属于用户。本书has_many：作者通过：作者身份。

要记住的重要一点是，作者不要创作书籍。用户创建书籍，并为书籍分配1个或多个作者。（作者模型只有一个名称列）

现在我想要这样的路线：

/authors   # all authors index
/authors/1/books  # all books with this author
/users/3/authors  # all authors used by user's books
                  # should this be /users/3/books/authors ???
/users/3/author/1/books # all books with author id=1 made by user with ID=3

这是我想出的，有人可以解释我哪里出错了以及如何纠正它？非常感谢。

的routes.rb

    resources :authors do
      member do
        get :books
      end
    end

   resources :users do
     resources :authors do
       member do
         get :books
       end
     end
   end

Answer 1

将书籍变成资源：

resources :authors do
  resources :books
end

resources :users do
  resources :authors do
    resources :books
  end
end

棘手的是你的书籍/作者控制器中的索引动作：

您必须检查是否提供了user_id并相应地加入：

作者控制者：

class AuthorsController < ApplicationController

  def index

    if params[:user_id]
      # authors used by this user's books
      @authors  = Author.joins(:authorships).joins('INNER JOIN books ON books.id = authorships.book_id').where(['books.user_id = ?', params[:user_id]]).group('authors.id')
    else
      # all authors
      @authors  = Author.all
    end
  end

end

BooksController：

class BooksController < ApplicationController

  def index

    if params[:user_id] && params[:author_id]
      # all books with :author_id made by :user_id
      @books  = Book.joins(:authorships).where(['authorships.author_id = ?', params[:author_id]], ['books.user_id = ?', params[:user_id]])
    elsif params[:author_id]
      # all books with :author_id
      @books  = Book.joins(:authorships).where(['authorships.author_id = ?', params[:author_id]])
    else
      # all books
      @books  = Book.all
    end
  end
end

Rail 3路由：解决与多个关联的路由问题

1 个答案: