1. घर
  2. सवाल और जवाब
  3. रूबी के लिए नया, क्या कोई मुझे इस त्रुटि को कंसोल से समझने में मदद कर सकता है?

रूबी के लिए नया, क्या कोई मुझे इस त्रुटि को कंसोल से समझने में मदद कर सकता है?

2013-07-05 6 views
5

मुझे वास्तव में यह सुनिश्चित नहीं है कि मेरे स्थानीयहोस्ट पर वेबपृष्ठ काम करने के लिए इसका क्या अर्थ है या मुझे क्या करना है। अभी यह सिर्फ एक त्रुटि दिखा रहा है जो पढ़ता है "हमें खेद है, लेकिन कुछ गलत हो गया।" जब मैं rails server चलाता हूं और क्रोम में localhost:3000 खोलता हूं।रूबी के लिए नया, क्या कोई मुझे इस त्रुटि को कंसोल से समझने में मदद कर सकता है?

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 

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स्रोत

2013-07-05 Alex S

+0

"खाली" का उपयोग करें? "खाली" के बजाय –

उत्तर

11

अन्य उत्तर सामान्य रूप में सही हैं। विशेष रूप से यह अपवाद newrelic_rpm मणि और रूबी 2.0 के पुराने संस्करणों के बीच असंगतता के कारण होता है। rails #8885 देखें।

newrelic_rpm मणि अद्यतन करें और इसे दूर जाना चाहिए।

स्रोत

2013-11-26 17:09:46

0

यह अपने विधि detail_args_for (अच्छी तरह से तकनीकी रूप से एक शून्य संदर्भ अपवाद) में एक अशक्त संदर्भ अपवाद है:

यहाँ सांत्वना उत्पादन होता है। आप एक चर एक शून्य मूल्य होता है, जो एक समस्या का कारण बनता है पर विधि empty? कॉल करने के लिए, क्योंकि वह नहीं के बराबर

स्रोत

2013-07-05 16:13:13 konkked

+2

रुबी में "शून्य संदर्भ अपवाद" जैसी कोई चीज़ नहीं है। रूबी जावा नहीं है। –

0

आप एक चर है कि कहीं से प्रारंभ नहीं किया गया पर .empty? कॉल कर रहे हैं में निर्धारित नहीं है कोशिश कर रहे हैं अपने detail_args_for विधि। यह शायद अगर आप शून्य मान की अनुमति देना चाहते .empty? की जाँच से पहले .nil? के लिए एक अतिरिक्त कॉल जोड़ने के लिए है:

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

स्रोत

2013-07-05 16:14:04

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