自定义错误处理和cancan

问题描述

我正在尝试实现自定义错误处理以及使用CanCan。当用户到达某个区域时，它们不允许转到，CanCan :: AccessDenied错误将被抛出，并将它们发送到根URL。相反，rescue_from Exception捕获CanCan :: AccessDenied，并且用户获得500错误。我做错了什么？

 ＃application_controller.rb 
 rescue_from CanCan :: AccessDenied do | exception | 
 redirect_to main_app.root_url，：alert => exception.message 
 end 
 
 rescue_from异常，
：with => ：render_error 
 rescue_from Mongoid :: Errors :: DocumentNotFound，
：with => ：render_not_found 
 rescue_from ActionController :: RoutingError，
：with => ：render_not_found 
 rescue_from ActionController :: UnknownController，
：with => ：render_not_found 
 rescue_from AbstractController :: ActionNotFound，
：with => ：render_not_found 
 
 
 def render_not_found（exception）
 render：template => /errors/404.html，
：layout => 'errors.html'，
：status => 404 
 end 
 
 def render_error（exception）
 render：template => /errors/500.html，
：layout => 'errors.html'，
：status => 500 
 end 
  

解决方案

你尝试重新排序rescue_from例外/错误，更通用的第一个，稍后更具体，例如

  rescue_from StandardError，
：with => ：render_error 
 rescue_from Mongoid :: Errors :: DocumentNotFound，
：with => ：render_not_found 
 rescue_from ActionController :: RoutingError，
：with => ：render_not_found 
 rescue_from ActionController :: UnknownController，
：with => ：render_not_found 
 rescue_from AbstractController :: ActionNotFound，
：with => ：render_not_found 
 rescue_from CanCan :: AccessDenied do | exception | 
 redirect_to main_app.root_url，：alert => exception.message 
 end 
  

注意：您可能希望将普通异常替换为StandardError。 / p>

I am trying to implement custom error handling as well as use CanCan. When a user reaches an area they aren't allowed to go to, a CanCan::AccessDenied error is thrown and they should be sent to the root url. Instead, 'rescue_from Exception' captures the CanCan::AccessDenied and the user gets a 500 error. What am I doing wrong?

#application_controller.rb
rescue_from CanCan::AccessDenied do |exception|
  redirect_to main_app.root_url, :alert => exception.message
end

rescue_from Exception,
  :with => :render_error
rescue_from Mongoid::Errors::DocumentNotFound,
  :with => :render_not_found
rescue_from ActionController::RoutingError,
  :with => :render_not_found
rescue_from ActionController::UnknownController,
  :with => :render_not_found
rescue_from AbstractController::ActionNotFound,
  :with => :render_not_found


def render_not_found(exception)
  render :template => "/errors/404.html",
       :layout => 'errors.html',
       :status => 404
end

def render_error(exception)
  render :template => "/errors/500.html",
       :layout => 'errors.html',
       :status => 500
end

解决方案

Did you try reordering rescue_from exceptions/errors, more generic first, more specific later, e.g.

rescue_from StandardError,
  :with => :render_error
rescue_from Mongoid::Errors::DocumentNotFound,
  :with => :render_not_found
rescue_from ActionController::RoutingError,
  :with => :render_not_found
rescue_from ActionController::UnknownController,
  :with => :render_not_found
rescue_from AbstractController::ActionNotFound,
  :with => :render_not_found
rescue_from CanCan::AccessDenied do |exception|
  redirect_to main_app.root_url, :alert => exception.message
end

Note: You might want to replace generic Exception with StandardError.

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