Ruby on rails Rails：如何显示特定状态代码的页面？

我对Rails还比较陌生，但我仍然不太了解路由。当用户收到某个错误代码（404）时，如何显示某个视图（如

404.html.erb

）？例如，如果用户获得一个不存在的页面（404），我如何监听该页面并在该事件上显示特定页面？

我知道Rails应用程序附带了一个

public

文件夹和预生成的404、500和422错误代码.html页面，但它们似乎不适合我。当我转到一个不存在的页面时，我收到一个GET错误。我将如何更改此设置？

---

谢谢

您可以通过本地主机访问公共页面。Rails在生产中遇到错误或404时会自动使用这些页面

localhost:3000/404 # => renders the 404.html
localhost:3000/500 # => renders the 500.html

您可以执行以下操作：

# in config/application.rb
config.exceptions_app = self.routes

# For testing on development environment, need to change consider_all_requests_local
# in config/development.rb
config.consider_all_requests_local = false

在这些更改之后重新启动服务器

# in routes.rb
get '/404', to: 'errors#not-found'
get '/422', to: 'errors#unprocessable-entity'
get '/500', to: 'errors#internal-error'

---

您可以设置自定义路由以从控制器呈现动态页面，就像普通控制器视图模板一样

config/routes.rb

MyApp::Application.routes.draw do
  # custom error routes
  match '/404' => 'errors#not_found', :via => :all
  match '/500' => 'errors#internal_error', :via => :all
end

class ErrorsController < ApplicationController    
  def not_found
    render(:status => 404)
  end
end

<div class="container">
  <div class="align-center">
    <h3>Page not found</h3>
    <%= link_to "Go to homepage", root_path %>
  </div>
</div>

app/controllers/errors\u controller.rb

MyApp::Application.routes.draw do
  # custom error routes
  match '/404' => 'errors#not_found', :via => :all
  match '/500' => 'errors#internal_error', :via => :all
end

class ErrorsController < ApplicationController    
  def not_found
    render(:status => 404)
  end
end

<div class="container">
  <div class="align-center">
    <h3>Page not found</h3>
    <%= link_to "Go to homepage", root_path %>
  </div>
</div>

类错误控制器404）
终止
终止

app/views/errors/not_found.html.erb

MyApp::Application.routes.draw do
  # custom error routes
  match '/404' => 'errors#not_found', :via => :all
  match '/500' => 'errors#internal_error', :via => :all
end

class ErrorsController < ApplicationController    
  def not_found
    render(:status => 404)
  end
end

<div class="container">
  <div class="align-center">
    <h3>Page not found</h3>
    <%= link_to "Go to homepage", root_path %>
  </div>
</div>

找不到页面