Question

环境：

Rails 3.2.3
Mac OS X Lion
Ruby-1.9.3-p194（MRI）

我有一个rails应用程序，我使用app / views / layouts / application.html.erb作为我用作菜单选项的某些链接的“左导航窗格”。

菜单中有两个使用link_to的链接（为简洁起见，这里简化了）。如果我删除一个链接并运行应用程序，剩余的链接会执行它应该执行的操作。如果我删除第二个链接并恢复第一个链接，则第一个链接会执行IT应该执行的操作。

但是，如果我同时在菜单中同时显示这两个链接，则单击其中一个链接将起作用，但单击第二个链接会产生运行时错误。

使用Pry和Rails源本身（3.2.3），我已经指出了框架中发生错误的位置。异常发生在actionpack-3.2.3 / lib / action_view / template.rb中，并且发生在以下代码行的render方法中：

def render(view, locals, buffer=nil, &block)
  ActiveSupport::Notifications.instrument("!render_template.action_view", :virtual_path => @virtual_path) do
    compile!(view)
    view.send(method_name, locals, buffer, &block)   # <----ERROR OCCURS HERE
  end
rescue Exception => e
  handle_render_error(view, e)
end

method_name的值= _app_views_layouts_application_html_erb ___ 1387085669206687706_70334317584180

在视图中，是此名称的方法。执行'send'时，会生成以下异常。

ActionController::RoutingError: No route matches {:action=>"signup_for_role",       
:controller=>"assignments", :club_id=>nil, :member_id=>[#<Member id: 2, first_name: 
"Joseph", last_name: "Smith", start_date: "2012-01-01", end_date: "9999-12-31", 
created_at: "2012-04-07 13:58:46", updated_at: "2012-05-06 21:54:12", club_id: 2, email:    
"joe.smith@gmail.com", assignable: true, address_one: nil, address_two: nil, city: nil, 
state: nil, zip_code: nil, phone: nil, mobile_phone: nil>]}

因为方法中的代码是由Rails而不是源代码文件生成的，所以我无法使用Pry逐步完成它;我只能'发送'消息并查看结果。

以下是布局中带有两个相关链接的代码：

<!DOCTYPE html>
<html>
  <head>
    <title>MyApp</title>
    <%= stylesheet_link_tag    "application" %>
    <%= javascript_include_tag "application" %>
    <%= csrf_meta_tags %>
  </head>
  <body>
    <div style='padding-left:10px;  margin-top:10px; ' >
      <div class='container' style='margin-top:50px; margin-left:50px;padding-right:200px; '>

        <!-- This link_to works, whether alone, or when the other link_to is present -->
        <%=  link_to "Sign Up for a Role", signup_for_role_club_member_assignments_path(params[:club_id], current_user_as_member) %>  
        <br/><br/>

        <!-- This link_to fails when both link_to's are present, but works when the other link_to is removed. -->
        <%= link_to "Clubs", clubs_path %><br>


      </div>
      <!-- ***************************************************************** -->
      <!-- Yield below... this is where the currently selected view displays -->
      <!-- ***************************************************************** -->
      <div class='container' style='margin-left:200px'  >
        <%= yield %>
      </div>
    </div>
  </body>
</html>

最后，这是我的routes.rb文件：

Rolemaster::Application.routes.draw do

  resources :sessions
  resources :enrollments
  resources :logs

  resources :clubs do
    resources :members do
      resources :assignments do
        collection do
          get 'signup_for_role'
          get 'display_success'
          get 'past_activity'
        end
      end
      resources :absences 
    end
    resources :roles 
    resources :role_groups  

    resources :meetings do
      get 'forassignment', :on => :collection
      get 'print'
      resources :assignments
    end

    resources :assignments do
      post 'generate', :on => :collection 
    end
    resources :absences do
      get 'list', :on => :collection
    end
  end  


  resources :users do
    put "update_password" => "users#update_password"
    put "update_email" => "users#update_email"
    get "edit_password" => "users#edit_password"
    get "edit_email"    => "users#edit_email"
  end

  match "agendas/print"  
  get "enrollments/new"
  post "enrollments/create"
  get "log_in" => "sessions#new", :as => "log_in"
  get "log_out" => "sessions#destroy", :as => "log_out"
  get "sign_up" => 'users#new', :as => 'sign_up'
  get "test/email"
  get "sessions/revoke_admin"
  get "sessions/revoke_super_user"


  get "admins" => "admins#index"
  root :to => 'sessions#new'
end

非常感谢任何帮助。到目前为止，我可能已经花了20个小时或更长时间。

Answer 1

总是阅读错误信息，事实就是这样）

params[:club_id] is nil

link_to在同一页面上与其他link_to失败，但单独工作

1 个答案: