NameError in Sources#show

Showing sources/_source_review.html.erb where line #26 raised:

undefined local variable or method `expertise_topic_ids' for #<sourcereview:0x10b584b78>

Extracted source (around line #26):

23:       <%= h source_review.note %>
24:
25:   <%- end -%>
26:   <%- if !source_review.expertise_topics.blank? -%>
27:
28: This source is an expert on <%= source_review.expertise_topics.collect { |t| link_to t.name, t } * ', ' %> 29:

Trace of template inclusion: /sources/show.html.erb

RAILS_ROOT: /Users/cw/Desktop/_projects/newstrust/newstrust_new
Application Trace | Framework Trace | Full Trace

vendor/rails/activerecord/lib/active_record/attribute_methods.rb:256:in `method_missing'
app/models/source_review.rb:15:in `expertise_topics'
app/views/sources/_source_review.html.erb:26:in `_run_erb_47app47views47sources47_source_review46html46erb'
app/views/sources/show.html.erb:155:in `_run_erb_47app47views47sources47show46html46erb'
app/views/sources/show.html.erb:145:in `_run_erb_47app47views47sources47show46html46erb'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:76:in `process'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74:in `synchronize'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel/rails.rb:74: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/mongrel-1.1.5/lib/mongrel/configurator.rb:282:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in `each'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel/configurator.rb:281:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:128:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/lib/mongrel/command.rb:212:in `run'
/Library/Ruby/Gems/1.8/gems/mongrel-1.1.5/bin/mongrel_rails:281

Request

Parameters:

{"id"=>"los_angeles_times"}

Show session dump
Response

Headers:

{"cookie"=>[],
 "Cache-Control"=>"no-cache"}