對於nil：nilclass，未定義的方法'status'

Question

嘗試將控制器與其索引視圖鏈接在一起時獲取此方法。

有了這個控制器：

class FeedbackController < ApplicationController 
    def index 
    end 
end 

這在路線：

resources :feedback 

我得到這個：

NoMethodError in FeedbackController#index 

undefined method `status' for nil:NilClass 

而這個堆棧跟蹤：

actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:31:in `block in process_action' 
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `block in instrument' 
activesupport (3.2.8) lib/active_support/notifications/instrumenter.rb:20:in `instrument' 
activesupport (3.2.8) lib/active_support/notifications.rb:123:in `instrument' 
actionpack (3.2.8) lib/action_controller/metal/instrumentation.rb:29:in `process_action' 
actionpack (3.2.8) lib/action_controller/metal/params_wrapper.rb:207:in `process_action' 
activerecord (3.2.8) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
actionpack (3.2.8) lib/abstract_controller/base.rb:121:in `process' 
actionpack (3.2.8) lib/abstract_controller/rendering.rb:45:in `process' 
actionpack (3.2.8) lib/action_controller/metal.rb:203:in `dispatch' 
actionpack (3.2.8) lib/action_controller/metal/rack_delegation.rb:14:in `dispatch' 
actionpack (3.2.8) lib/action_controller/metal.rb:246:in `block in action' 
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:73:in `call' 
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:73:in `dispatch' 
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:36:in `call' 
journey (1.0.4) lib/journey/router.rb:68:in `block in call' 
journey (1.0.4) lib/journey/router.rb:56:in `each' 
journey (1.0.4) lib/journey/router.rb:56:in `call' 
actionpack (3.2.8) lib/action_dispatch/routing/route_set.rb:600:in `call' 
omniauth (1.1.1) lib/omniauth/strategy.rb:177:in `call!' 
omniauth (1.1.1) lib/omniauth/strategy.rb:157:in `call' 
omniauth (1.1.1) lib/omniauth/strategy.rb:177:in `call!' 
omniauth (1.1.1) lib/omniauth/strategy.rb:157:in `call' 
/Users/macbook/.rbenv/versions/1.9.3-rc1/lib/ruby/gems/1.9.1/bundler/gems/rack-facebook-signed-request-802e6f0820f1/lib/rack/facebook/signed_request.rb:32:in `call' 
warden (1.2.1) lib/warden/manager.rb:35:in `block in call' 
warden (1.2.1) lib/warden/manager.rb:34:in `catch' 
warden (1.2.1) lib/warden/manager.rb:34:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
rack (1.4.1) lib/rack/etag.rb:23:in `call' 
rack (1.4.1) lib/rack/conditionalget.rb:25:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/head.rb:14:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/params_parser.rb:21:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/flash.rb:242:in `call' 
rack (1.4.1) lib/rack/session/abstract/id.rb:205:in `context' 
rack (1.4.1) lib/rack/session/abstract/id.rb:200:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/cookies.rb:339:in `call' 
activerecord (3.2.8) lib/active_record/query_cache.rb:64:in `call' 
activerecord (3.2.8) lib/active_record/connection_adapters/abstract/connection_pool.rb:473:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:28:in `block in call' 
activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `_run__2909243921452486150__call__401413506945164242__callbacks' 
activesupport (3.2.8) lib/active_support/callbacks.rb:405:in `__run_callback' 
activesupport (3.2.8) lib/active_support/callbacks.rb:385:in `_run_call_callbacks' 
activesupport (3.2.8) lib/active_support/callbacks.rb:81:in `run_callbacks' 
actionpack (3.2.8) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/reloader.rb:65:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/remote_ip.rb:31:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/show_exceptions.rb:56:in `call' 
railties (3.2.8) lib/rails/rack/logger.rb:26:in `call_app' 
railties (3.2.8) lib/rails/rack/logger.rb:16:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/request_id.rb:22:in `call' 
rack (1.4.1) lib/rack/methodoverride.rb:21:in `call' 
rack (1.4.1) lib/rack/runtime.rb:17:in `call' 
activesupport (3.2.8) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
rack (1.4.1) lib/rack/lock.rb:15:in `call' 
actionpack (3.2.8) lib/action_dispatch/middleware/static.rb:62:in `call' 
railties (3.2.8) lib/rails/engine.rb:479:in `call' 
railties (3.2.8) lib/rails/application.rb:223:in `call' 
railties (3.2.8) lib/rails/railtie/configurable.rb:30:in `method_missing' 
thin (1.5.0) lib/thin/connection.rb:81:in `block in pre_process' 
thin (1.5.0) lib/thin/connection.rb:79:in `catch' 
thin (1.5.0) lib/thin/connection.rb:79:in `pre_process' 
thin (1.5.0) lib/thin/connection.rb:54:in `process' 
thin (1.5.0) lib/thin/connection.rb:39:in `receive_data' 
eventmachine (1.0.0) lib/eventmachine.rb:187:in `run_machine' 
eventmachine (1.0.0) lib/eventmachine.rb:187:in `run' 
thin (1.5.0) lib/thin/backends/base.rb:63:in `start' 
thin (1.5.0) lib/thin/server.rb:159:in `start' 
thin (1.5.0) lib/thin/controllers/controller.rb:86:in `start' 
thin (1.5.0) lib/thin/runner.rb:187:in `run_command' 
thin (1.5.0) lib/thin/runner.rb:152:in `run!' 
thin (1.5.0) bin/thin:6:in `<top (required)>' 
/Users/macbook/.rbenv/versions/1.9.3-rc1/lib/ruby/gems/1.9.1/bin/thin:19:in `load' 
/Users/macbook/.rbenv/versions/1.9.3-rc1/lib/ruby/gems/1.9.1/bin/thin:19:in `<main>' 

我試着複製控制器來反饋和適當調整路線/文件名，但我仍然得到該錯誤。

也嘗試使用:as => :feedback但仍然得到錯誤。如果文件夾中沒有/feedback/index.html.haml，它會拋出正確的「模板丟失」頁面，但即使是完全空的模型，控制器和視圖也會顯示此狀態錯誤。

Answer 1

把這一個弄出來......多麼古怪。

您不能在控制器中定義響應方法。所以我有：

def response 
end 

而只是有這會導致這個錯誤！