0

我的 application_controller.rb 代码是：

class ApplicationController < ActionController::Base# Prevent CSRF attacks by raising an exception.#For APIs, you may want to use: null_session instead.
  protect_from_forgery
  before_filter: set_current_user
  rescue_from ActionController::RoutingError, with: : render_error

  def render_error
    p "**************************************"
  end

  def set_current_user
    User.current_user = current_user
  end

 end

现在，如果我尝试点击我的home/xyz这个异常应该已经捕获但控制永远不会出现render_error。为了捕获此异常，我还需要做些什么吗？或者，如果 Rails 4.2 有更好的方法，有人可以指导我使用那些我尝试过Exception NotificaitonGem 但似乎也不起作用的方法。注意：我正在使用开发环境。

我的错误日志：

Started GET "/qweq"
for 172.24.106.197 at 2016 - 09 - 07 16: 03: 01 + 0530

ActionController::RoutingError(No route matches[GET]
    "/qweq"):
  actionpack(4.2.6) lib / action_dispatch / middleware / debug_exceptions.rb: 21: in `call'
  actionpack (4.2.6) lib/action_dispatch/middleware/show_exceptions.rb:30:in `
call '
  railties (4.2.6) lib/rails/rack/logger.rb:38:in `call_app'
railties(4.2.6) lib / rails / rack / logger.rb: 20: in `block in call'
  activesupport (4.2.6) lib/active_support/tagged_logging.rb:68:in `
block in tagged '
  activesupport (4.2.6) lib/active_support/tagged_logging.rb:26:in `tagged'
activesupport(4.2.6) lib / active_support / tagged_logging.rb: 68: in `tagged'
  railties (4.2.6) lib/rails/rack/logger.rb:20:in `
call '
  actionpack (4.2.6) lib/action_dispatch/middleware/request_id.rb:21:in `call'
rack(1.6.4) lib / rack / methodoverride.rb: 22: in `call'
  rack (1.6.4) lib/rack/runtime.rb:18:in `
call '
  activesupport (4.2.6) lib/active_support/cache/strategy/local_cache_middleware.rb:28:in `call'
rack(1.6.4) lib / rack / lock.rb: 17: in `call'
  actionpack (4.2.6) lib/action_dispatch/middleware/static.rb:120:in `
call '
  rack (1.6.4) lib/rack/sendfile.rb:113:in `call'
railties(4.2.6) lib / rails / engine.rb: 518: in `call'
  railties (4.2.6) lib/rails/application.rb:165:in `
call '
  rack (1.6.4) lib/rack/lock.rb:17:in `call'
rack(1.6.4) lib / rack / content_length.rb: 15: in `call'
  rack (1.6.4) lib/rack/handler/webrick.rb:88:in `
service '
  /home/883562/.rvm/rubies/ruby-2.1.4/lib/ruby/2.1.0/webrick/httpserver.rb:138:in `service' / home / 883562 / .rvm / rubies / ruby - 2.1.4 / lib / ruby / 2.1.0 / webrick / httpserver.rb: 94: in `run'
  /home/883562/.rvm/rubies/ruby-2.1.4/lib/ruby/2.1.0/webrick/server.rb:295:in `
block in start_thread '
4

2 回答 2

2

您无法使用该代码处理路由错误的原因是因为在实例化任何控制器之前已解析路由。如果未解决（未找到匹配的控制器/操作），则路由器本身会引发此错误。自然，应用程序控制器永远不会看到它。

您可以做的是定义一个“包罗万象”的路线，该路线将映射到控制器/动作并在该动作（或您想做的任何事情）中进行跟踪。

于 2016-09-07T11:46:57.730 回答
0

配置/应用程序.rb

module NameOfYourApp
  class Application < Rails::Application
    require Rails.root.join("lib/custom_public_exceptions")
    config.exceptions_app = CustomPublicExceptions.new(Rails.public_path)
  end
end

配置/路由.rb

match "/404" => "errors#error404", via: [ :get, :post, :patch, :delete ]

lib/custom_public_exceptions.rb

class CustomPublicExceptions < ActionDispatch::PublicExceptions
  def call(env)
    status = env["PATH_INFO"][1..-1]

    if status == "404"
      Rails.application.routes.call(env)
    else
      super
    end
  end
end

应用程序/控制器/errors_controller.rb

class ErrorsController < ApplicationController
  def error404
    render status: :not_found
  end
end

应用程序/视图/错误/error404.er

  <span> 404 </span>
  <p>Page Not Found<p>

您可以使用ErrorsController处理不同的错误并自定义相应的视图模板以提供更好看的错误页面

于 2016-09-07T11:23:44.613 回答