如何为嵌套资源使用复数名称？答案

【问题标题】：How to use plural names for nested resources?如何为嵌套资源使用复数名称？
【发布时间】：2012-04-21 20:21:06
【问题描述】：

我正在使用 Ruby on Rails v3.2.2，我想为嵌套资源使用复数名称。也就是说，在我的config/routes.rb 中有（注意：“类别”和“文章”是示例资源）：

resources :categories do
  resources :articles do
    collection do
      get  'one'
      post 'two'
      put  'three'
    end
    member do
      get  'four'
      post 'five'
      put  'six'
    end
  end
end

以上语句生成以下内容：

$ rake routes
  one_category_articles GET    /categories/:category_id/articles/one(.:format)      articles#one
  two_category_articles POST   /categories/:category_id/articles/two(.:format)      articles#two
three_category_articles PUT    /categories/:category_id/articles/three(.:format)    articles#three
  four_category_article GET    /categories/:category_id/articles/:id/four(.:format) articles#four
  five_category_article POST   /categories/:category_id/articles/:id/five(.:format) articles#five
   six_category_article PUT    /categories/:category_id/articles/:id/six(.:format)  articles#six
      category_articles GET    /categories/:category_id/articles(.:format)          articles#index
                        POST   /categories/:category_id/articles(.:format)          articles#create
   new_category_article GET    /categories/:category_id/articles/new(.:format)      articles#new
  edit_category_article GET    /categories/:category_id/articles/:id/edit(.:format) articles#edit
       category_article GET    /categories/:category_id/articles/:id(.:format)      articles#show
                        PUT    /categories/:category_id/articles/:id(.:format)      articles#update
                        DELETE /categories/:category_id/articles/:id(.:format)      articles#destroy
             categories GET    /categories(.:format)                                categories#index
                        POST   /categories(.:format)                                categories#create
           new_category GET    /categories/new(.:format)                            categories#new
          edit_category GET    /categories/:id/edit(.:format)                       categories#edit
               category GET    /categories/:id(.:format)                            categories#show
                        PUT    /categories/:id(.:format)                            categories#update
                        DELETE /categories/:id(.:format)                            categories#destroy

我想更改我的 config/routes.rb 中的语句，以便为 category_article 生成以下具有复数名称仅的路由器部分”（即我想分别用categories_article/categories_articles代替category_article/category_articles）：

$ rake routes
# Note: I marked changes from the previous outputting with '=>'.
=>   one_categories_articles GET    /categories/:category_id/articles/one(.:format)      articles#one
=>   two_categories_articles POST   /categories/:category_id/articles/two(.:format)      articles#two
=> three_categories_articles PUT    /categories/:category_id/articles/three(.:format)    articles#three
=>   four_categories_article GET    /categories/:category_id/articles/:id/four(.:format) articles#four
=>   five_categories_article POST   /categories/:category_id/articles/:id/five(.:format) articles#five
=>    six_categories_article PUT    /categories/:category_id/articles/:id/six(.:format)  articles#six
=>       categories_articles GET    /categories/:category_id/articles(.:format)          articles#index
                             POST   /categories/:category_id/articles(.:format)          articles#create
        new_category_article GET    /categories/:category_id/articles/new(.:format)      articles#new
       edit_category_article GET    /categories/:category_id/articles/:id/edit(.:format) articles#edit
            category_article GET    /categories/:category_id/articles/:id(.:format)      articles#show
                             PUT    /categories/:category_id/articles/:id(.:format)      articles#update
                             DELETE /categories/:category_id/articles/:id(.:format)      articles#destroy
                  categories GET    /categories(.:format)                                categories#index
                             POST   /categories(.:format)                                categories#create
                new_category GET    /categories/new(.:format)                            categories#new
               edit_category GET    /categories/:id/edit(.:format)                       categories#edit
                    category GET    /categories/:id(.:format)                            categories#show
                             PUT    /categories/:id(.:format)                            categories#update
                             DELETE /categories/:id(.:format)

【问题讨论】：

您是否三思而后行？ category_articles 毫无疑问地表明，对于相应的助手，您需要提供一个类别而不是文章。使用categories_articles，您会感到困惑。
resources :categories, :as => 'categories' do
@DanS - 您的代码没有按预期工作。
@jdoe - 我想使用这种方法，因为我想成功使用例如polymorphic_path 方法。此时如果我使用polymorphic_path(Categories::Article)，我会收到NoMethodError 错误，因为它返回categories_articles_path（而不是category_articles_path）。

标签： ruby-on-rails ruby-on-rails-3 routing routes

【解决方案1】：

如果您对提供的帮助程序不满意，那么您可以使用魔法：

<%= link_to 'One', [:one, @category, Article] %>
# /categories/123/articles/one

<%= link_to 'Four', [:four, @category, @article] %>
# /categories/123/articles/456/four

<%= link_to 'Edit the article', [:edit, @category, @article] %>
# /categories/123/articles/456/edit

<%= link_to 'All articles for the category', [@category, Article] %>
# /categories/123/articles

同样的方法可用于为form_for 助手指定:url 选项。

我希望你明白了！

附：请注意使用类（如Article）表示您想查看所有记录，并使用模型实例（如@article）表示您将要看到一篇文章。

【讨论】：