设置'link_to'语句的'：controller'参数时遇到问题 [英] Trouble on setting the ':controller' parameter for a 'link_to' statement

问题描述

我使用Ruby on Rails 3.0.9，我想知道为什么我得到下面描述的错误，我该如何解决。

在我的 /views/articles/categories/_content.html.erb 档案：

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

如果我设置了 content [：article_controller ] ：（： true 和 false only_path 选项）

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



我分别得到以下错误（注意 ：controller values）：

  1.`ActionView :: Template :: Error {：controller =>articles / categories / articles，：action =>new}）`
 2.`ActionView :: Template :: Error（没有路由匹配{：controller =文章/文章，：action =>new}）`
 3. ActionView :: Template :: Error（没有路由匹配{：controller =>articles /，：action = ;new}）`
 4.`ActionView :: Template :: Error（没有路由匹配{：controller =>article //，：action =>new}）`
 4.`ActionView :: Template :: Error（没有路由匹配{：controller =>articles / categories /，：action =>new}）`
  
 
 
 
 是Ruby on Rails错误还是我的错？问题是什么，  link_to 正常工作？
 
 
 
但我可以通过使用：
 <％= link_to（New article，{：controller => '../'，：action => 'new'}）％> 
  
 但是为什么它适用于'... /'但不是其他方式？ 
 
 
 
 
 
 
我注意到，我尝试设置 content [：article_contr8oller] 似乎依赖于正在处理视图文件的base当前控制器路径（控制器文件 app / controllers / articles / categories / concerns_controller.rb   - 阅读下面的更多信息）...为什么会发生？
 
 
 
它也发生在使用 url_for ：
  url_for（：controller => 'articles'，：action =>'new'）
  
 rake routes 命令我得到以下：
  article_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} 
 article_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 = 
文章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} 
文章GET /articles/:id(.:format） {：action =>show，：controller =>articles} 
 PUT /articles/:id(.:format）{：action =>update，：controller = article} 
 DELETE /articles/:id(.:format）{：action =>destroy，：controller =>articles} 
  pre> 
 
 
 PS：如果您需要更多信息，请告诉我，我也会更新问题。
 
 
 
 
 
 
  UPDATE I  
 
 
 
在我的路线文件中，我有：
 命名空间：articles do文章：类别end 
 
 scope：path => 'articles / categories /：id'，：controller => 'articles / categories / concern'do 
 ... 
 end 
 
资源：articles 
  
 
 
 
 
 
 
  UPDATE II  
 
 
 
 c $ c> /views/articles/categories/_content.html.erb 档案：
 < div class =links> 
<％= link_to（新文章，{：controller => content [：article_controller]，：action =>'new'}）％> 
< / div> 
 
在我的文章:: Categories :: ConcernsController（也就是在 app / controllers / articles / categories / concern_controller.rb 文件）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 
  
 
 
解决方案
为什么不使用 link_to' ，new_article_path ？为什么在使用命名的路径/ url帮助器（ new_article_url ）时，使用旧的，累了的 url_for ...  
 
I am using Ruby on Rails 3.0.9 and I would like to know why I get the error described below and how can I solve that.

In my /views/articles/categories/_content.html.erb file I have:
...
<%= link_to("New article", {:controller => content[:article_controller], :action => 'new'}) %>
...
If I set the content[:article_controller] to (both setting true and false for the :only_path option)
 1. content[:article_controller] = 'articles'
 2. content[:article_controller] = '/articles'
 3. content[:article_controller] = '/articles/'
 4. content[:article_controller] = '/'
 4. content[:article_controller] = ''
I get respectively the following errors (note :controller values):
 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"})`
Is it a Ruby on Rails bug or is it my fault? What is the problem and how can I solve that making the link_to properly work?

However I can solve that problem by using:
<%= link_to("New article", {:controller => '../', :action => 'new'}) %>
But why it works with '.../' but not in other ways?



I noticed that some time the controller path for which I try to set the content[:article_contr8oller] seems to relying on the "base" current controller path that is handling the view file (the controller file is app/controllers/articles/categories/concerns_controller.rb - read below for more information)... why it happens?

It also happens using url_for:
url_for(:controller => 'articles', :action => 'new')
Running the rake routes command I get the following:
   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.: If you need more information, let me know and I will update the question as well.



UPDATE I

In my route file I have:
namespace :articles do articles :categories end

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

resources :articles




UPDATE II

In my view /views/articles/categories/_content.html.erb files I have:
<div class="links">
  <%= link_to("New article", {:controller => content[:article_controller], :action => 'new'}) %>
</div>
In my Articles::Categories::ConcernsController (that is, in the app/controllers/articles/categories/concerns_controller.rb file) I have:
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

解决方案
Why aren't you using link_to 'New article', new_article_path? Why use the old, tired url_for ... when you can use the named path/url helper (new_article_url).

                        
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