Rails 中的自定义错误页面? [英] Custom Error Pages in Rails?

问题描述

我需要在我的 rails 应用程序中实现一个自定义错误页面，以允许我使用 erb.

I need to implement a custom error page in my rails application that allows me to use erb.

我一直在关注本教程(http://blog.tommilewski.net/2009/05/custom-error-pages-in-rails/) 并且我无法让它在本地(或远程)工作.我正在运行 Rails 2.3.5

I've been following this tutorial (http://blog.tommilewski.net/2009/05/custom-error-pages-in-rails/) and I cannot get it to work locally (or remotely). I am running Rails 2.3.5

这是该方法的要点.

1) 在application_controller"中，我覆盖了render_optional_error_file(status_code)"方法，并将可见性设置为protected"，就像这样.

1) in the 'application_controller', I over ride the "render_optional_error_file(status_code)" method, and set the visibility to "protected", like this.

protected

def render_optional_error_file(status_code)
  known_codes = ["404", "422", "500"]
  status = interpret_status(status_code)

  if known_codes.include?(status_code)
    render :template => "/errors/#{status[0,3]}.html.erb", :status => status, :layout => 'errors.html.erb'
  else
    render :template => "/errors/unknown.html.erb", :status => status, :layout => 'errors.html.erb'
  end
end

def local_request?
  true
end

我还在视图中创建了一个名为 errors 的文件夹，并创建了以下视图:404.html.erb、422.html.erb, 500.html.erb,unknown.html.erb 和我创建了一个新的布局errors.html.erb"

I also created a folder within views called errors and created the following views: 404.html.erb, 422.html.erb, 500.html.erb,unknown.html.erb and I created a new layout "errors.html.erb"

我似乎无法让它工作.我一直试图通过导航到 http://localhost:3000/foobar 来触发 404 页面——但是，而不是获取新的 404.html.erb，我似乎遇到了标准的 apache 500 错误.当我同时尝试 mongrel_rails start 和 mongrel_rails start -e production 时会发生这种情况.

I can't seem to get it to work. I've been trying to trigger the 404 page by navigating to http://localhost:3000/foobar -- but, instead of getting the new 404.html.erb, I seem to be getting the standard apache 500 error. This happens when I try both mongrel_rails start and mongrel_rails start -e production.

推荐答案

我建议使用异常来呈现此类错误页面，以便您可以使用继承来对错误消息进行分组...

I would suggest using exceptions to render such error pages, so you can use inheritance to group your error messages...

首先声明一些(我通常在application_controller.rb中做)

First, declare some (I usually do it in application_controller.rb)

class Error404 < StandardError; end
class PostNotFound < Error404; end

然后在ApplicationController中添加代码来处理它们

Then add code to ApplicationController to handle them

class ApplicationController < ActionController::Base

  # ActionController::RoutingError works in Rails 2.x only.
  # rescue_from ActionController::RoutingError, :with => :render_404
  rescue_from Error404, :with => :render_404
  rescue_from PostNotFound, :with => :render_post_not_found


  def render_404
    respond_to do |type| 
      type.html { render :template => "errors/error_404", :status => 404, :layout => 'error' } 
      type.all  { render :nothing => true, :status => 404 } 
    end
    true
  end

  def render_post_not_found
    respond_to do |type| 
      type.html { render :template => "errors/shop_not_found", :status => 404, :layout => 'error' } 
      type.all  { render :nothing => true, :status => 404 } 
    end
    true
  end
end

这会使用错误布局呈现错误/错误_404.应该让你开始:)

This renders errors/error_404 with the errors layout. Should get you started :)

在你的 target_controller 中:

And in your target_controller:

raise PostNotFound unless @post

<小时>

编辑

关于为什么 ActionController::RoutingError 不适用于 rails 3 的详细解释:Rails 3.0 异常处理.

for a longer explanation on why ActionController::RoutingError doesn't work for rails 3: Rails 3.0 Exception Handling.

铁路票4444

如果您的应用程序依赖于使用其扩展应用程序的引擎自己的路线，事情会破裂，因为这些路线永远不会得到开除！"

"If your application relies on engines that extend your app with their own routes, things will break because those routes will never get fired!"

这篇关于Rails 中的自定义错误页面?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！