Basic app troubleshoot

Dear board, I am running a fork of a quite large Rails 2.3.5 app (lots of plugins etc.). It has worked before and I know it works on my colleague's machine. I'm not sure where to begin troubleshooting this though (I can't find much good Rails troubleshooting material anywhere!). Can anyone help? Thanks in advance.

Browser output:

NoMethodError in Home#index

Showing app/views/home/index.html.erb where line #11 raised:

undefined method `alternative_url' for #<NewsItem:0x50cae18> Extracted source (around line #11):

8: :width => 499, 9: :height => 281, 10: :version => "9", 11: :flashvars => front_page_panel_flashvars(@featured_panels), 12: :params => {:allowScriptAccess => "always", :bgcolor => "1C1C1C", :wmode => "transparent"}, 13: :alt => (link_to(image_tag(@featured_panels.first.try(:image_path), :width => 499, :height => 281), @featured_panels.first.try(:path)) unless @featured_panels.empty?) 14: %> RAILS_ROOT: /Users/matthew/Code/maloca

Application Trace | Framework Trace | Full Trace /Users/matthew/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/attribute_methods.rb:260:in `method_missing' /Users/matthew/Code/maloca/app/models/news_item.rb:91:in `path' /Users/matthew/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations/association_proxy.rb:217:in `send' /Users/matthew/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/associations/association_proxy.rb:217:in `method_missing' /Users/matthew/Code/maloca/app/helpers/home_helper.rb:4:in `front_page_panel_flashvars' /Users/matthew/Code/maloca/app/helpers/home_helper.rb:4:in `map' /Users/matthew/Code/maloca/app/helpers/home_helper.rb:4:in `front_page_panel_flashvars' /Users/matthew/Code/maloca/app/views/home/index.html.erb:11:in `_run_erb_app47views47home47index46html46erb' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:34:in `send' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:34:in `render_without_trace_View_path_r_2_Rendering' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:306:in `with_template' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:30:in `render_without_trace_View_path_r_2_Rendering' /Users/matthew/Code/maloca/vendor/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/method_tracer.rb:319:in `render' /Users/matthew/Code/maloca/vendor/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/method_tracer.rb:141:in `trace_execution_scoped' /Users/matthew/Code/maloca/vendor/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/method_tracer.rb:314:in `render' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_view/template.rb:205:in `render_template' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:265:in `render' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:348:in `_render_with_layout' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:262:in `render' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1250:in `render_for_file' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:945:in `render_without_benchmark' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:51:in `render' /Users/matthew/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms' /Users/matthew/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:10:in `realtime' /Users/matthew/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:51:in `render' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1326:in `default_render' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1332:in `perform_action_without_filters' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:617:in `call_filters' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue' /Users/matthew/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms' /Users/matthew/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:10:in `realtime' /Users/matthew/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/rescue.rb:160:in `perform_action_without_flash' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/flash.rb:146:in `perform_action_without_newrelic_trace' /Users/matthew/Code/maloca/vendor/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:254:in `perform_action' /Users/matthew/Code/maloca/vendor/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/method_tracer.rb:141:in `trace_execution_scoped' /Users/matthew/Code/maloca/vendor/gems/newrelic_rpm-2.13.1/lib/new_relic/agent/instrumentation/controller_instrumentation.rb:247:in `perform_action' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `send' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `process_without_filters' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:606:in `process' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:391:in `process' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:386:in `call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb:437:in `call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:87:in `dispatch' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:121:in `_call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:130:in `build_middleware_stack' /Users/matthew/Code/maloca/vendor/gems/newrelic_rpm-2.13.1/lib/new_relic/rack/developer_mode.rb:20:in `call' /Users/matthew/Code/maloca/vendor/gems/newrelic_rpm-2.13.1/lib/new_relic/rack/developer_mode.rb:20:in `call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/string_coercion.rb:25:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/head.rb:9:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/methodoverride.rb:24:in `call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/params_parser.rb:15:in `call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/session/abstract_store.rb:122:in `call' /Users/matthew/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:29:in `call' /Users/matthew/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/query_cache.rb:34:in `cache' /Users/matthew/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:9:in `cache' /Users/matthew/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/query_cache.rb:28:in `call' /Users/matthew/.gem/ruby/1.8/gems/activerecord-2.3.5/lib/active_record/connection_adapters/abstract/connection_pool.rb:361:in `call' /Users/matthew/.gem/ruby/1.8/gems/activesupport-2.3.5/lib/active_support/cache/strategy/local_cache.rb:24:in `call' /Users/matthew/Code/maloca/vendor/gems/hoptoad_notifier-2.3.8/lib/hoptoad_notifier/rack.rb:27:in `call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/failsafe.rb:26:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `synchronize' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/lock.rb:11:in `call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:114:in `call' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/reloader.rb:34:in `run' /Users/matthew/.gem/ruby/1.8/gems/actionpack-2.3.5/lib/action_controller/dispatcher.rb:108:in `call' /Users/matthew/.gem/ruby/1.8/gems/rails-2.3.5/lib/rails/rack/static.rb:31:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:46:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `each' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/urlmap.rb:40:in `call' /Users/matthew/.gem/ruby/1.8/gems/rails-2.3.5/lib/rails/rack/log_tailer.rb:17:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/content_length.rb:13:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/chunked.rb:15:in `call' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/handler/mongrel.rb:64:in `process' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:159:in `process_client' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `each' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:158:in `process_client' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `initialize' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `new' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:285:in `run' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `initialize' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `new' /Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel.rb:268:in `run' /Library/Ruby/Gems/1.8/gems/rack-1.0.1/lib/rack/handler/mongrel.rb:34:in `run' /Users/matthew/.gem/ruby/1.8/gems/rails-2.3.5/lib/commands/server.rb:111 /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `gem_original_require' /Library/Ruby/Site/1.8/rubygems/custom_require.rb:31:in `require' script/server:3 Request

Parameters:

{"section_id"=>1, "language_id"=>3} Show session dump

I would have a look at this line I think

Colin

Matt, I've never seen that kind of error 'alternative_url' before and there is no reference pages on google. Simply I guess that the error is saying there is no method 'alternative_url'. Is that method you code yourself?