Rails:如何显示特定状态代码的页面?

您可以设置自定义路由以从控制器渲染动态页面,就像普通控制器视图模板一样。

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

应用程序/控制器/错误_控制器。rb型

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

应用程序/视图/错误/未找到。html。erb公司

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

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

# 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'