为 'link_to' 语句设置 ':controller' 参数时遇到问题

Question

我正在使用 Ruby on Rails 3.0.9，我想知道为什么会出现下面描述的错误以及如何解决。

在我的/views/articles/categories/_content.html.erb 文件中，我有：

...
<%= link_to("New article", {:controller => content[:article_controller], :action => 'new'}) %>
...

如果我将content[:article_controller] 设置为（:only_path 选项同时设置true 和false）

 1. content[:article_controller] = 'articles'
 2. content[:article_controller] = '/articles'
 3. content[:article_controller] = '/articles/'
 4. content[:article_controller] = '/'
 4. content[:article_controller] = ''

我分别得到以下错误（注意:controller 值）：

 1. `ActionView::Template::Error (No route matches {:controller=>"articles/categories/articles", :action=>"new"})`
 2. `ActionView::Template::Error (No route matches {:controller=>"articles//articles", :action=>"new"})`
 3. `ActionView::Template::Error (No route matches {:controller=>"articles/", :action=>"new"})`
 4. `ActionView::Template::Error (No route matches {:controller=>"articles//", :action=>"new"})`
 4. `ActionView::Template::Error (No route matches {:controller=>"articles/categories/", :action=>"new"})`

这是 Ruby on Rails 的错误还是我的错？ 问题出在哪里，我该如何解决，让 link_to 正常工作？

但是我可以使用以下方法解决这个问题：

<%= link_to("New article", {:controller => '../', :action => 'new'}) %>

但为什么它适用于 '.../' 而不是其他方式？

---

我注意到有时我尝试设置content[:article_contr8oller] 的控制器路径似乎依赖于处理视图文件的“基本”当前控制器路径（控制器文件是app/controllers/articles/categories/concerns_controller.rb - 请阅读下文了解更多信息）...为什么会这样？

使用url_for 也会发生这种情况：

url_for(:controller => 'articles', :action => 'new')

运行rake routes 命令我得到以下信息：

   articles_categories GET    /articles/categories(.:format)          {:action=>"index", :controller=>"articles/categories"}
                       POST   /articles/categories(.:format)          {:action=>"create", :controller=>"articles/categories"}
 new_articles_category GET    /articles/categories/new(.:format)      {:action=>"new", :controller=>"articles/categories"}
edit_articles_category GET    /articles/categories/:id/edit(.:format) {:action=>"edit", :controller=>"articles/categories"}
     articles_category GET    /articles/categories/:id(.:format)      {:action=>"show", :controller=>"articles/categories"}
                       PUT    /articles/categories/:id(.:format)      {:action=>"update", :controller=>"articles/categories"}
                       DELETE /articles/categories/:id(.:format)      {:action=>"destroy", :controller=>"articles/categories"}
              articles GET    /articles(.:format)                     {:action=>"index", :controller=>"articles"}
                       POST   /articles(.:format)                     {:action=>"create", :controller=>"articles"}
           new_article GET    /articles/new(.:format)                 {:action=>"new", :controller=>"articles"}
          edit_article GET    /articles/:id/edit(.:format)            {:action=>"edit", :controller=>"articles"}
               article GET    /articles/:id(.:format)                 {:action=>"show", :controller=>"articles"}
                       PUT    /articles/:id(.:format)                 {:action=>"update", :controller=>"articles"}
                       DELETE /articles/:id(.:format)                 {:action=>"destroy", :controller=>"articles"}

P.S.：如果您需要更多信息，请告诉我，我也会更新问题。

---

更新我

在我的路线文件中，我有：

namespace :articles do articles :categories end

scope :path => 'articles/categories/:id', :controller => 'articles/categories/concerns' do
  ...
end

resources :articles

---

更新 II

在我看来/views/articles/categories/_content.html.erb 我拥有的文件：

<div class="links">
  <%= link_to("New article", {:controller => content[:article_controller], :action => 'new'}) %>
</div>

在我的 Articles::Categories::ConcernsController 中（即在 app/controllers/articles/categories/concerns_controller.rb 文件中）我有：

def show
  @articles_category = Articles::Category.find(params[:id])

  respond_to do |format|
    format.html {
      render :partial => '/views/articles/categories/_content.html.erb',
        :locals  => {
          :content => {
             :article_controller => '/articles'
          }
        }
        format.js  {
          ...
        end
  end
end

Answer 1

你为什么不使用link_to 'New article', new_article_path？当您可以使用命名路径/url 帮助器 (new_article_url) 时，为什么还要使用旧的、疲惫的 url_for ...。

Answer 2

您尝试过使用符号吗？我认为他们更“直接”。

<%= link_to("New article", {:controller => content[:article_controller].to_sym, :action => :new}) %>

您是否尝试过使用相对路径？

<%= link_to("New article", {:controller => "../#{content[:article_controller]}", :action => 'new'}) %>