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ruby on rails - parsing url

 原文  2014-03-18 11:47:00  6   1    ruby-on-rails/ ruby/ web-services

Question

I've a problem with receive data in controller. I must receive params in web service controller but I have follow problem with that.I researched and found that problem in rails parse this is article about that article .I would like find some way for parse it myself.I just want take last same item of ulr for example job_name=*. I have not receive any data in controller after this error. this is request request and error.

localhost:3000/ws/job_histories/index?job_name=name&job_name[]=*

Status: 500 Internal Server Error

undefined method each_pair' for nil:NilClass
org/jruby/RubyKernel.java:238:in each_pair' for nil:NilClass
org/jruby/RubyKernel.java:238:in each_pair' for nil:NilClass
org/jruby/RubyKernel.java:238:in method_missing'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activesupport/lib/active_support/whiny_nil.rb:52:in method_missing'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb:46:in method_missing'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb:46:in method_missing'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb:46:in update'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activesupport/lib/active_support/core_ext/hash/indifferent_access.rb:91:in merge'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/request.rb:385:in merge'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/request.rb:385:in merge'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/request.rb:385:in parameters'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/base.rb:1290:in assign_shortcuts'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/base.rb:527:in assign_shortcuts'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/base.rb:527:in assign_shortcuts'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/base.rb:527:in process'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/filters.rb:606:in process_with_filters'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/rescue.rb:65:in process_with_filters'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/rescue.rb:65:in process_with_filters'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/rescue.rb:65:in call_with_exception'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:90:in dispatch'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:87:in dispatch'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:87:in dispatch'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:87:in dispatch'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:85:in dispatch'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:121:in dispatch'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:121:in dispatch'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:121:in _call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:130:in build_middleware_stack' org/jruby/RubyProc.java:270:in call'
org/jruby/RubyProc.java:220:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/string_coercion.rb:25:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/string_coercion.rb:25:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/string_coercion.rb:25:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/head.rb:9:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/methodoverride.rb:24:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/methodoverride.rb:24:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/methodoverride.rb:24:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/params_parser.rb:15:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/session/abstract_store.rb:177:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/session/abstract_store.rb:177:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/session/abstract_store.rb:177:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/query_cache.rb:29:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in cache'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/query_cache.rb:9:in cache'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/query_cache.rb:28:in cache'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/query_cache.rb:28:in cache'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/query_cache.rb:28:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/activerecord/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/failsafe.rb:26:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/failsafe.rb:26:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/failsafe.rb:26:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/lock.rb:11:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/lock.rb:11:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/lock.rb:11:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/lock.rb:11:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:114:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/reloader.rb:34:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/reloader.rb:34:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/reloader.rb:34:in run'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/actionpack/lib/action_controller/dispatcher.rb:108:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/railties/lib/rails/rack/static.rb:31:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/railties/lib/rails/rack/static.rb:31:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/railties/lib/rails/rack/static.rb:31:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/urlmap.rb:49:in call' org/jruby/RubyArray.java:1612:in each'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/urlmap.rb:41:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/railties/lib/rails/rack/log_tailer.rb:17:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/railties/lib/rails/rack/log_tailer.rb:17:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/rails/railties/lib/rails/rack/log_tailer.rb:17:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/content_length.rb:13:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/chunked.rb:15:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/chunked.rb:15:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/chunked.rb:15:in call'
C:/skybot/int_3_6/skybot-2.0/gui/vendor/gems/rack-1.1.3/lib/rack/handler/mongrel.rb:67:in process'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:159:in process'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:159:in process'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:159:in process_client' org/jruby/RubyArray.java:1612:in each'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:158:in each'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:158:in each'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:158:in process_client'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:110:in process_client'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:285:in process_client'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:285:in process_client'
C:/jruby-1.6.5.1/lib/ruby/gems/1.8/gems/mongrel-1.1.5-java/lib/mongrel.rb:285:in run' org/jruby/RubyProc.java:270:in call'
org/jruby/RubyProc.java:224:in call'
org/jruby/RubyProc.java:224:in call'
org/jruby/RubyProc.java:224:in call'

1 answers

solution1
 1  2014-03-19 09:59:18

I was going to write a comment, but it will be clearer here: 

undefined method each_pair' for nil:NilClass

This error means you're calling a method / function on a data object which doesn't exist. Considering you're trying to call data from an endpoint, you need to show us the index action you're using 

localhost:3000/ws/job_histories/index?job_name[]=name

This should set: params[:job_name] which you'll be able to access from your controller action

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