1. ev
  2. Soru-cevap
  3. Ruby'ye yeni, birisi bu hatayı konsoldan çözmemde yardımcı olabilir mi?

Ruby'ye yeni, birisi bu hatayı konsoldan çözmemde yardımcı olabilir mi?

2013-07-05 17 views
5

Ben gerçekten sadece değil ne anlama geldiğini ya da benim localhost üzerinde çalışan web sayfasını almak için yapmanız gereken şey emin. Şu anda sadece "Üzgünüz, ama bir şeyler ters gitti" yazan bir hata gösteriyor. rails server çalıştırdığımda ve localhost:3000 chrome açın.Ruby'ye yeni, birisi bu hatayı konsoldan çözmemde yardımcı olabilir mi?

Started GET "https://stackoverflow.com/users/sign_in" for 127.0.0.1 at 2013-07-05 12:07:07 -0400 
Processing by Devise::SessionsController#new as HTML 
Completed 500 Internal Server Error in 55ms 

NoMethodError (undefined method `empty?' for nil:NilClass): 
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    newrelic_rpm (3.5.5.38) lib/new_relic/agent/instrumentation/rails3/action_controller.rb:153:in `render_with_newrelic' 
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    actionpack (3.2.11) lib/action_controller/metal/rescue.rb:29:in `process_action' 
    actionpack (3.2.11) lib/action_controller/metal/instrumentation.rb:30:in `block in process_action' 
    activesupport (3.2.11) lib/active_support/notifications.rb:123:in `block in instrument' 
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    activesupport (3.2.11) lib/active_support/notifications.rb:123:in `instrument' 
    actionpack (3.2.11) lib/action_controller/metal/instrumentation.rb:29:in `process_action' 
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    activerecord (3.2.11) lib/active_record/railties/controller_runtime.rb:18:in `process_action' 
    newrelic_rpm (3.5.5.38) lib/new_relic/agent/instrumentation/rails3/action_controller.rb:34:in `block in process_action' 
    newrelic_rpm (3.5.5.38) lib/new_relic/agent/instrumentation/controller_instrumentation.rb:268:in `block in perform_action_with_newrelic_trace' 
    newrelic_rpm (3.5.5.38) lib/new_relic/agent/method_tracer.rb:240:in `trace_execution_scoped' 
    newrelic_rpm (3.5.5.38) lib/new_relic/agent/instrumentation/controller_instrumentation.rb:263:in `perform_action_with_newrelic_trace' 
    newrelic_rpm (3.5.5.38) lib/new_relic/agent/instrumentation/rails3/action_controller.rb:33:in `process_action' 
    actionpack (3.2.11) lib/abstract_controller/base.rb:121:in `process' 
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    journey (1.0.4) lib/journey/router.rb:68:in `block in call' 
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    actionpack (3.2.11) lib/action_dispatch/routing/route_set.rb:601:in `call' 
    rack-pjax (0.7.0) lib/rack/pjax.rb:12:in `call' 
    newrelic_rpm (3.5.5.38) lib/new_relic/rack/error_collector.rb:8:in `call' 
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    actionpack (3.2.11) lib/action_dispatch/middleware/best_standards_support.rb:17:in `call' 
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    activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `_run__1343605869620971269__call__1397566206717956287__callbacks' 
    activesupport (3.2.11) lib/active_support/callbacks.rb:405:in `__run_callback' 
    activesupport (3.2.11) lib/active_support/callbacks.rb:385:in `_run_call_callbacks' 
    activesupport (3.2.11) lib/active_support/callbacks.rb:81:in `run_callbacks' 
    actionpack (3.2.11) lib/action_dispatch/middleware/callbacks.rb:27:in `call' 
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    actionpack (3.2.11) lib/action_dispatch/middleware/remote_ip.rb:31:in `call' 
    actionpack (3.2.11) lib/action_dispatch/middleware/debug_exceptions.rb:16:in `call' 
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    railties (3.2.11) lib/rails/rack/logger.rb:32:in `call_app' 
    railties (3.2.11) lib/rails/rack/logger.rb:16:in `block in call' 
    activesupport (3.2.11) lib/active_support/tagged_logging.rb:22:in `tagged' 
    railties (3.2.11) lib/rails/rack/logger.rb:16:in `call' 
    actionpack (3.2.11) lib/action_dispatch/middleware/request_id.rb:22:in `call' 
    rack (1.4.5) lib/rack/methodoverride.rb:21:in `call' 
    rack (1.4.5) lib/rack/runtime.rb:17:in `call' 
    activesupport (3.2.11) lib/active_support/cache/strategy/local_cache.rb:72:in `call' 
    rack (1.4.5) lib/rack/lock.rb:15:in `call' 
    actionpack (3.2.11) lib/action_dispatch/middleware/static.rb:62:in `call' 
    railties (3.2.11) lib/rails/engine.rb:479:in `call' 
    railties (3.2.11) lib/rails/application.rb:223:in `call' 
    rack (1.4.5) lib/rack/content_length.rb:14:in `call' 
    railties (3.2.11) lib/rails/rack/log_tailer.rb:17:in `call' 
    rack (1.4.5) lib/rack/handler/webrick.rb:59:in `service' 
    /Users/Alex/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/httpserver.rb:138:in `service' 
    /Users/Alex/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/httpserver.rb:94:in `run' 
    /Users/Alex/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/webrick/server.rb:295:in `block in start_thread'

kaynak

2013-07-05 Alex S

+0

"blank?" "boş" yerine –

cevap

11

diğer cevaplar genel olarak doğrudur. Özellikle bu istisna, newrelic_rpm gem ve Ruby 2.0'ın eski sürümleri arasındaki uyumsuzluktan kaynaklanır. Bakınız rails #8885.

Güncelleme newrelic_rpm mücevher ve yok olacaktır.

kaynak

2013-11-26 17:09:46

0

Bu sizin yöntemle detail_args_for (iyi teknik olarak Nil referans istisna) bir null başvuru istisnadır: Burada

konsol çıkıştır. Bunu sen bir yere başlatılmamış bir değişkeni .empty? aradığınız nil

kaynak

2013-07-05 16:13:13 konkked

+2

Ruby'de “null reference exception” diye bir şey yoktur. Ruby Java değil. –

0

tanımlanmamış çünkü bir sorun neden olan bir Nil değerine sahip bir değişken üzerinde yöntemini empty? aramaya çalışıyoruz senin detail_args_for yöntemi. Size Nil değerlere izin vermek istiyorsanız .empty? kontrol etmeden önce .nil? için ek bir çağrı eklemek için muhtemelen:

if(!someVar.nil? && someVar.empty?)

kaynak

2013-07-05 16:14:04

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