我需要帮助来调查和修复 4.5.* 中的警报（高级版）小部件。升级到 4.5.1 后，它停止了渲染。升级到 4.5.6 没有帮助。
在仪表板上显示“尝试显示小部件“alt_alerts”时发生错误。请联系管理员。”
即使我为项目创建了单独的空质量门，它也会显示相同的错误。
在 sonar.log 中：
2015.11.26 17:39:48 ERROR web[rails] Can not render widget alt_alerts: NilClass can't be coerced into Fixnum
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyFixnum.java:432:in `-'
2015.11.26 17:39:48 ERROR web[rails] compiled-template:48:in `_run_inline_235596400_locals_dashboard_configuration_widget_widget_properties'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyArray.java:1613:in `each'
2015.11.26 17:39:48 ERROR web[rails] compiled-template:34:in `_run_inline_235596400_locals_dashboard_configuration_widget_widget_properties'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyKernel.java:2227:in `send'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable.rb:34:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:306:in `with_template'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable.rb:30:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:269:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/app/helpers/dashboard_helper.rb:162:in `widget_body'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/app/views/dashboard/_widget.html.erb:3:in `_run_erb_app47views47dashboard47_widget46html46erb_locals_object_widget'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyKernel.java:2227:in `send'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable.rb:34:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:306:in `with_template'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable.rb:30:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable_partial.rb:20:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/benchmarking.rb:30:in `benchmark'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable_partial.rb:19:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/template.rb:205:in `render_template'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable_partial.rb:44:in `render_partial'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/partials.rb:184:in `render_partial'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:267:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/app/views/dashboard/index.html.erb:19:in `_run_erb_app47views47dashboard47index46html46erb'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyArray.java:1613:in `each'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/app/views/dashboard/index.html.erb:15:in `_run_erb_app47views47dashboard47index46html46erb'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyRange.java:427:in `each'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/app/views/dashboard/index.html.erb:9:in `_run_erb_app47views47dashboard47index46html46erb'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyKernel.java:2227:in `send'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable.rb:34:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:306:in `with_template'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/renderable.rb:30:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/template.rb:205:in `render_template'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:265:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:348:in `_render_with_layout'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:346:in `_render_with_layout'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_view/base.rb:262:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/base.rb:1252:in `render_for_file'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/base.rb:936:in `render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/benchmarking.rb:51:in `render_with_benchmark'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activesupport-2.3.15/lib/active_support/core_ext/benchmark.rb:17:in `ms'
2015.11.26 17:39:48 ERROR web[rails] jar:file:/usr/local/sonarqube-4.5.6/lib/server/jruby-complete-1.7.9.jar!/META-INF/jruby.home/lib/ruby/1.8/benchmark.rb:308:in `realtime'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activesupport-2.3.15/lib/active_support/core_ext/benchmark.rb:17:in `ms'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/benchmarking.rb:51:in `render_with_benchmark'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/base.rb:1328:in `default_render'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/base.rb:1334:in `perform_action'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/filters.rb:617:in `call_filters'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/filters.rb:610:in `perform_action_with_filters'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/benchmarking.rb:68:in `perform_action_with_benchmark'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activesupport-2.3.15/lib/active_support/core_ext/benchmark.rb:17:in `ms'
2015.11.26 17:39:48 ERROR web[rails] jar:file:/usr/local/sonarqube-4.5.6/lib/server/jruby-complete-1.7.9.jar!/META-INF/jruby.home/lib/ruby/1.8/benchmark.rb:308:in `realtime'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activesupport-2.3.15/lib/active_support/core_ext/benchmark.rb:17:in `ms'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/benchmarking.rb:68:in `perform_action_with_benchmark'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/rescue.rb:160:in `perform_action_with_rescue'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/flash.rb:151:in `perform_action_with_flash'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyKernel.java:2223:in `send'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/base.rb:532:in `process'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/filters.rb:606:in `process_with_filters'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/base.rb:391:in `process'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/base.rb:386:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/routing/route_set.rb:450:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/dispatcher.rb:87:in `dispatch'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/dispatcher.rb:85:in `dispatch'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/dispatcher.rb:121:in `_call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/dispatcher.rb:130:in `build_middleware_stack'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyProc.java:290:in `call'
2015.11.26 17:39:48 ERROR web[rails] org/jruby/RubyProc.java:224:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activerecord-2.3.15/lib/active_record/query_cache.rb:29:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activerecord-2.3.15/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activerecord-2.3.15/lib/active_record/query_cache.rb:9:in `cache'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activerecord-2.3.15/lib/active_record/query_cache.rb:28:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/activerecord-2.3.15/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/config/environment.rb:66:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/string_coercion.rb:25:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/rack-1.1.6/lib/rack/head.rb:9:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/rack-1.1.6/lib/rack/methodoverride.rb:24:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/params_parser.rb:15:in `call'
2015.11.26 17:39:48 ERROR web[rails] file:/usr/local/sonarqube-4.5.6/lib/server/jruby-rack-1.1.13.2.jar!/jruby/rack/session_store.rb:70:in `context'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/rack-1.1.6/lib/rack/session/abstract/id.rb:58:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/failsafe.rb:26:in `call'
2015.11.26 17:39:48 ERROR web[rails] /usr/local/sonarqube-4.5.6/web/WEB-INF/gems/gems/actionpack-2.3.15/lib/action_controller/dispatcher.rb:106:in `call'
2015.11.26 17:39:48 ERROR web[rails] file:/usr/local/sonarqube-4.5.6/lib/server/jruby-rack-1.1.13.2.jar!/rack/adapter/rails.rb:34:in `serve_rails'
2015.11.26 17:39:48 ERROR web[rails] file:/usr/local/sonarqube-4.5.6/lib/server/jruby-rack-1.1.13.2.jar!/rack/adapter/rails.rb:39:in `call'
2015.11.26 17:39:48 ERROR web[rails] file:/usr/local/sonarqube-4.5.6/lib/server/jruby-rack-1.1.13.2.jar!/rack/handler/servlet.rb:22:in `call'