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

Question

我有一个Subscriber 模型，它接受一个“电话号码”和一个“访问”整数。我有两个控制器 Subscribers 和 Visits(super 和 sub) 我以前从未使用过嵌套控制器，我相信我在命名空间方面遇到了一些问题。因为我找回了未初始化的常量错误。基本上，订户控制器注册一个订户，访问控制器通过用户输入他们的电话号码来计算他们访问的次数。为什么我会收到此错误？为了清楚起见，我将显示我的代码。

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"

观看次数

  <h1>hey</hey>

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

错误

Answer 1

嗯，我猜你正在尝试将 url subscriber/visits/new 路由到 new VisitsController 中的操作？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 上方。

干杯

Answer 2

您可能不需要从另一个控制器继承一个控制器。像往常一样简单地定义控制器：

app/controllers/subscribers_controller.rb

class SubscribersController < ApplicationController
  # methods for Subscribers
end

在 app/controllers/visits_controller.rb 中

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 可以通过它正在寻找的对象的名称找到正确的源文件。这是 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Rails Routing from the Outside In 指南中关于Adding More RESTful Actions 的部分可能会有所帮助。

1) 要将 visits 路由为嵌套资源，这似乎是您实际尝试执行的操作，您可以使用：

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) 要使 visits#new 在 VisitsController 中成为一个简单的集合（非成员）操作，您可能需要这样：

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 构造为成员操作，请使用：

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的成员路由。

4) 要简单地使 visits 路由似乎包含在 subscribers 中，您可以使用以下命令：

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。