Rails: Fedena网页有一个重定向循环错误。无方法错误未定义nil的方法config_value :NilClass

Question

我已经在我的网站上安装了fedena (rails应用程序)

http://www.technoadmin.com/

我已经安装了所有的插件，gem，创建并迁移了数据库。

我创建了这样的符号链接

ln -s ~/fedena/public ~/public_html

访问我的网页时，它显示

此网页有一个重定向循环

所以请帮帮我。我是一个新手。在过去的一个月里，我一直在尝试安装这个应用程序。我想我已经走到最后一步了。所以请帮我解决这个错误，我将非常感谢你。

我的生产日志文件是

# Logfile created on Fri Jul 26 14:55:03 +0530 2013

Processing UserController#login (for 182.73.241.18 at 2013-07-26 15:00:48) [GET]
  Parameters: {"action"=>"login", "controller"=>"user"}
[FedenaRescue] No method error undefined method `config_value' for nil:NilClass

NoMethodError (undefined method `config_value' for nil:NilClass):
  app/controllers/application_controller.rb:319:in `set_user_language'
  vendor/bundle/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:178:in `send'
  vendor/bundle/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:178:in `evaluate_method'
  vendor/bundle/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/callbacks.rb:166:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:225:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:629:in `run_before_filters'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:615:in `call_filters'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/rescue.rb:160:in `perform_action_without_flash'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/flash.rb:146:in `perform_action'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `send'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `process_without_filters'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:606:in `process'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:391:in `process'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:386:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb:437:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:87:in `dispatch'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:121:in `_call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:130:in `build_middleware_stack'
  vendor/bundle/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in `call'
  vendor/bundle/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in `call'
  vendor/bundle/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
  vendor/bundle/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:9:in `cache'
  vendor/bundle/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:28:in `call'
  vendor/bundle/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/string_coercion.rb:25:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/params_parser.rb:15:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/session/cookie_store.rb:93:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/failsafe.rb:26:in `call'
  vendor/bundle/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:106:in `call'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/rack/request_handler.rb:96:in `process_request'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_request_handler.rb:513:in `accept_and_process_next_request'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_request_handler.rb:274:in `main_loop'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/classic_rails/application_spawner.rb:321:in `start_request_handler'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `send'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/classic_rails/application_spawner.rb:275:in `handle_spawn_application'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/utils.rb:479:in `safe_fork'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/classic_rails/application_spawner.rb:270:in `handle_spawn_application'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:357:in `__send__'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:180:in `start'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/classic_rails/application_spawner.rb:149:in `start'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:219:in `spawn_rails_application'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb:132:in `lookup_or_add'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:214:in `spawn_rails_application'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb:82:in `synchronize'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server_collection.rb:79:in `synchronize'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:213:in `spawn_rails_application'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:132:in `spawn_application'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/spawn_manager.rb:275:in `handle_spawn_application'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:357:in `__send__'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:357:in `server_main_loop'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/lib/phusion_passenger/abstract_server.rb:206:in `start_synchronously'
  /usr/lib/ruby/gems/1.8/gems/passenger-3.0.9/helper-scripts/passenger-spawn-server:99

Redirected to http://technoadmin.com/user/dashboard

这些是从310到325的行，而我的application_controller.rb中只有325行

return @local_tzone_time
  end

  private
  def set_user_language
    lan = Configuration.find_by_config_key("Locale")
    I18n.default_locale = :en
    Translator.fallback(true)
    if session[:language].nil?
      I18n.locale = lan.config_value
    else
      I18n.locale = session[:language]
    end
    News.new.reload_news_bar
  end
end

Answer 1

问题出在一个名为config_value的方法上

NoMethodError (undefined method config_value' for nil:NilClass): app/controllers/application_controller.rb:319:inset_user_language' 

所以，在第319行检查你的application_controller.rb，并发布其中的内容

编辑：

在您的代码中(第319行)，您在lan上调用config_value -但错误消息指出lan的值为nil -因此不能对其调用config_value。

前面有lan = Configuration.find_by_config_key("Locale") --所以我猜rails找不到名为“config_key”的语言环境--但我真的不太确定。这段代码是你写的，还是由gem生成的？

Answer 2

当我尝试使用Docker在Ubuntu 20.04上设置Fedena时，我也遇到了同样的问题。

每次我尝试在我的浏览器上访问http://server-address:8080:/user/dashboard上的应用程序时，都会得到一个重定向。然后在我的控制台上，我得到了这个错误：

web_1  | Processing UserController#dashboard (for 103.89.5.96 at 2020-10-25 18:33:15) [GET]
web_1  |   Parameters: {"controller"=>"user", "action"=>"dashboard"}
web_1  | [FedenaRescue] No method error undefined method `config_value' for nil:NilClass
web_1  | 
web_1  | NoMethodError (undefined method `config_value' for nil:NilClass):
web_1  |   app/controllers/application_controller.rb:342:in `set_user_language'

这里是我如何修复它的

注释：这是一个临时修复，因为我没有太多时间深入研究代码库。

该问题源于app/controllers/application.rb文件中的以下代码：

private

def set_user_language
  lan = Configuration.find_by_config_key('Locale')
  I18n.default_locale = :en
  Translator.fallback(true)
  I18n.locale = if session[:language].nil?
                  lan.config_value
                else
                  session[:language]
                end
  News.new.reload_news_bar
end

我假设动作set_user_language试图根据用户机器/应用程序上设置的默认语言环境语言或会话语言为用户设置一种语言，但是在lan.config_value中调用Ian的config_value方法似乎是Nil。

这会导致重定向错误，因为它是使用before_filter在app/controllers/application.rb中调用的

before_filter :set_user_language

因此，在应用程序中完成任何操作之前，它都会被调用。

临时修复方法是注释掉app/controllers/application.rb文件顶部定义的before_filter：

# before_filter :set_user_language

现在，您可以再次尝试访问该页面。

您还可以考虑运行命令rake db:seed将db/seed.rb文件中的数据植入数据库，因为它包含一些重要的数据，应用程序需要这些数据才能顺利运行。而且它似乎还包含Configuration.的config_value数据

就这样。

我希望这对有帮助