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，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/ ），我无法使其在本地工作（或远程）。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

这是这个方法的要点。

Here's the gist of the approach.

1）在'application_controller'中，我用render_optional_error_file（status_code）方法，将可见性设置为protected，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

我还在视图内创建了一个名为 errors 并创建了以下视图： 404.html.erb ， 422.html.erb ， 500.html.erb ， unknown.html.erb ，我创建了一个新的布局错误.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，而不是获取新的 404.html.erb ，我似乎得到了标准的apache 500错误。当我尝试 mongrel_rails开始和 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这样的错误页面，所以你可以使用继承来分组你的错误消息...

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）

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

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

然后添加代码到ApplicationController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

这会使错误布局错误/ error_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

---

/ strong>

---

Edit

更多的解释为什么ActionController :: RoutingError不rails 3的工作：
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.

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