Question

我有一个Subscriber模型，它接受一个“phone_number”和一个“visit”整数。我有两个控制器Subscribers和Visits（超级和子级）我以前从未使用过嵌套控制器，我对命名空间有一些问题我相信。因为我收回了未初始化的常量错误。基本上，用户控制器注册用户，并且访问控制器通过用户输入他们的phone_number来计算他们访问过的次数。为什么我收到此错误？为了清楚起见，我会展示我的代码。

控制器

  class Subscribers::VisitsController < ApplicationController
   def new
    @subscriber = Subscriber.new
   end

   def create
    @subscriber = Subscriber.find_by_phone_number(params[:phone_number])
    if @subscriber
     @subscriber.visit += 1
     @subscriber.save
     redirect_to subscribers_visits_new_path(:subscriber)
    else
    render "new"
    end
   end
 end


   class SubscribersController < ApplicationController
 def index
  @subscriber = Subscriber.all
 end

 def new
  @subscriber = Subscriber.new
 end

 def create
  @subscriber = Subscriber.create(subscriber_params)
  if @subscriber.save
    flash[:success] = "Subscriber Has Been successfully Created"
    redirect_to new_subscriber_path(:subscriber)
  else
    render "new"
  end
 end

路线

  Rails.application.routes.draw do
  devise_for :users
  resources :subscribers, except: :show
  get '/subscribers/visits/new', to: 'subscribers/visits#new'


  root "welcomes#index"

视图

  <h1>hey</hey>

  <%= form_for @subscriber do |form| %>
   <div class="form-group">
   <p>
   <%= form.label :phone_number %>
   <%= form.text_field :phone_number %>
   </p>
  <% end %>

ERROR

Answer 1

嗯，我的猜测是你试图在subscriber/visits/new中将网址new发送到VisitsController行动？如何更改此行：

get '/subscribers/visits/new', to: 'subscribers/visits#new'

到：

namespace :subscribers do
  get '/visits/new', to: 'visits#new'
end

如果仍然出现错误，请尝试将此块移至resources :subscribers, except: :show以上。

干杯

Answer 2

您可能不需要从另一个控制器继承一个控制器。只需像往常一样定义控制器：

应用/控制器/ subscribers_controller.rb

class SubscribersController < ApplicationController # methods for Subscribers end
app / controllers / visits_controller.rb

中的

class VisitsController < ApplicationController
  # methods for Visits
end

请注意，这些必须位于单独的文件中，以便Rails可以通过其查找的对象的名称找到正确的源文件。这是一个Rails命名约定。

关于您的路线，您需要更改为使用4种路线格式之一。阅读Adding More RESTful Actions指南中关于Rails Routing from the Outside In的部分可能有所帮助。

1）要将visits作为嵌套资源进行路由，这就是您实际尝试做的事情，您可以使用它：

resources :subscribers, except: :show do resources :visits end

这将产生这些路线：

GET /subscribers/new POST /subscribers GET /subscribers GET /subscribers/:id/edit PATCH /subscribers/:id/update DELETE /subscribers/:id/destroy GET /subscribers/:id/visits/new POST /subscribers/:id/visits GET /subscribers/:id/visits GET /subscribers/:id/visits/:id GET /subscribers/:id/visits/:id/edit PATCH /subscribers/:id/visits/:id/update DELETE /subscribers/:id/visits/:id/destroy

这是嵌套资源和独立控制器的典型路由结构。

2）要在VisitsController中使visits#new成为简单的集合（非成员）操作，您可能会想要这样：

resources :subscribers, except: :show do collection do get 'visits/new', to 'visits#new' post 'visits', to 'visits#create' end end

这将产生这些路线：

GET /subscribers/new POST /subscribers GET /subscribers GET /subscribers/:id/edit PATCH /subscribers/:id/update DELETE /subscribers/:id/destroy GET /subscribers/visits/new POST /subscribers/visits

这通常用于在现有资源和控制器中添加新的顶级路由。

3）要将visits构建为成员操作，请使用以下命令：

resources :subscribers, except: :show do member do get 'visits/new', to 'visits#new' post 'visits', to 'visits#create' end end

这将产生这些路线：

GET /subscribers/new POST /subscribers GET /subscribers GET /subscribers/:id/edit PATCH /subscribers/:id/update DELETE /subscribers/:id/destroy GET /subscribers/:id/visits/new POST /subscribers/:id/visits

这通常用于在现有资源和控制器中添加新成员路由。

4）要简单地将visits路由显示为subscribers，您可以使用此功能：

get '/subscribers/visits/new', to: 'visits#new' post '/subscribers/visits', to: 'visits#create' resources :subscribers, except: :show

这将产生这些路线：

GET /subscribers/visits/new POST /subscribers/visits GET /subscribers/new POST /subscribers GET /subscribers GET /subscribers/:id/edit PATCH /subscribers/:id/update DELETE /subscribers/:id/destroy

这可用于使任意路由看起来包含在现有资源中，而它们实际上可能是独立的。

rails的路由错误 - 未初始化的常量SubscribersController

2 个答案: