Question

我收到此错误：

Routing Error
uninitialized constant RegistrationsController

这是我的日志：

Started GET "/registrants/1/registrations/new" for 127.0.0.1 at 2012-07-03 00:55:44 -0500

ActionController::RoutingError (uninitialized constant RegistrationsController):

Rendered /.rvm/gems/ruby-1.9.2-p0/gems/actionpack-3.1.3/lib/action_dispatch/middleware/templates/rescues/routing_error.erb within rescues/layout (8.5ms)

这是我的routes.rb的一部分：

registrant_registrations GET    /registrants/:registrant_id/registrations(.:format)          {:action=>"index", :controller=>"registrations"}
                                   POST   /registrants/:registrant_id/registrations(.:format)          {:action=>"create", :controller=>"registrations"}
       new_registrant_registration GET    /registrants/:registrant_id/registrations/new(.:format)      {:action=>"new", :controller=>"registrations"}
      edit_registrant_registration GET    /registrants/:registrant_id/registrations/:id/edit(.:format) {:action=>"edit", :controller=>"registrations"}
           registrant_registration GET    /registrants/:registrant_id/registrations/:id(.:format)      {:action=>"show", :controller=>"registrations"}
                                   PUT    /registrants/:registrant_id/registrations/:id(.:format)      {:action=>"update", :controller=>"registrations"}

这是我的注册控制器，位于/app/controllers/portal/registrations_controller.rb：

class Portal::RegistrationsController < ApplicationController
  def create
        @registrant = current_member.registrants.find(params[:registrant])
        @registration = @registrant.registrations.build

        respond_to do |format|
          if @registration.save
            format.html {   redirect_to root_path, :notice => "Registration successfully created!" }
            format.json { head :ok }
          else
           format.html { redirect_to root_path, :notice => "There was a problem with the registration." }
          end
        end     
  end

end

当我从new_registrant_registration_path(registrant)的视图中调用Portal#index时出现此错误。

编辑：

为了完整性，在找到解决方案之前，这里是我的routes.rb文件。 Radar提到了我发布的要点，但我想我会把代码放在这里以防gist被删除。

MyApp::Application.routes.draw do

  match 'admin' => 'admin/dashboard#index', :as => :admin_root
  match 'portal' => 'portal#index', :as => :member_root

  namespace 'admin' do
    match 'profile' => 'profile#show', :as => :profile

    resources :members
    resources :admins
        resources :packages
        resources :products
        resources :levels
        resources :lessons
        resources :registrations
        resources :registrants, :controller => 'customers/registrants'
        resources :locations
        resources :schools
        resources :terms
        resources :customers
        resources :invoices
        resources :payments
  end

  namespace 'member' do
    resources :registrations
  end

  match 'register' => 'member/registrations#new', :as => :signup  
  match 'login' => 'member_sessions#new', :as => :login
  match 'logout' => 'member_sessions#destroy', :as => :logout  
  match 'admin/login' => 'admin_sessions#new', :as => :admin_login
  match 'admin/logout' => 'admin_sessions#destroy', :as => :admin_logout

  match 'member/activate/:activation_code' => 'member/activations#create', :as => :member_activation
  match 'member/:id/activate/resend' => 'member/activations#resend', :as => :resend_member_activation
  match 'member/:id/activate' => 'member/activations#new', :as => :new_member_activation

  match 'member/password/reset/begin' => 'member/password_resets#new', :as => :new_member_password_reset, :via => :get
  match 'member/password/reset' => 'member/password_resets#create', :as => :member_password_resets, :via => :post
  match 'member/password/:token/finish' => 'member/password_resets#edit', :as => :edit_member_password_reset, :via => :get
  match 'member/password/reset' => 'member/password_resets#update', :as => :member_password_reset, :via => :put

  match 'admin/packages/new/:partial' => 'admin/packages#new'

  resources :admins

  resources :registrants, :controller => 'portal/registrants' do
    resources :registrations
  end

  resource :admin_session
  resource :member_session

  root :to => 'portal#index'

end

Answer 1

为了说清楚：marcamillion进入了#rubyonrails和Freenode以及shared his config/routes.rb。这就是我弄清楚他正在制作的错误然后找到答案的地方。

两件事。

首先：管理员根路径

而不是像这样定义admin命名空间的根路由：

match 'admin' => 'admin/dashboard#index', :as => :admin_root

在namespace :admin调用中定义它，如下所示：

namespace 'admin' do
  root :to => "dashboard#index"
end

这会自动将其定义为admin_root_path和admin_root_url，因此您无需这样做，它会自动为控制器添加admin/前缀，因此您赢了也不需要这样做。

第二：引用RegistrantsController

目前您的config/routes.rb：

resources :registrants, :controller => 'portal/registrants' do
  resources :registrations
end

这将使用registrants正确定义Portal::RegistrantsController的资源路由，但将使用Portal::RegistrationsController 定义下面的嵌套路由。将做的是尝试使用RegistrationsController，这就是您收到该错误的原因。

要解决此问题，我建议您使用scope方法，如下所示：

scope :module => Portal do
 resources :registrants do
  resources :registrations
 end
end

scope方法以这种方式使用时，会告诉Rails块内路由的控制器位于Portal命名空间下。这意味着它会知道resources :registrants适用于Portal::Registrants而resources :registrations适用于Portal::Registrations，从而可以解决您所看到的错误。

Answer 2

如果您更改此行，该怎么办：

class Portal::RegistrationsController < ApplicationController

为：

class RegistrationsController < ApplicationController

Answer 3

这很奇怪。我认为，您的控制器应位于/app/controllers/registrants/registrations_controller.rb，如下所示：

class Registrants::RegistrationsController < Registrants::ApplicationController
  def create
    @registration = registrant.registrations.build

    ...
  end
end

class Registrants::ApplicationController < ApplicationController
  def registrant
    current_member.registrants.find(params[:registrant_id])
  end
end

注册人:: ApplicationController（/app/controllers/registrants/application_controller.rb）控制器的目的是避免代码重复。

嵌套控制器中未初始化的常量错误

3 个答案:

首先：管理员根路径

第二：引用RegistrantsController