NoMethodError in Taxonomies#index

Showing app/views/taxonomies/index.html.erb where line #20 raised:

undefined method `parent' for nil:NilClass
Extracted source (around line #20):

17:
18: <% @taxonomies.each do |t| %>
19:         Id: <%= t.id %>
20:         Parent id: <%= t.parent.parent %> - <%= t.term.name %><br />
21: <% end %>
22:
23:
RAILS_ROOT: /Users/lawrencescott/Desktop/Clean up/S3DB/Dropbox/Dropbox/consultant

Application Trace | Framework Trace | Full Trace
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.5/lib/active_support/whiny_nil.rb:52:in `method_missing'
/Users/lawrencescott/Desktop/Clean up/S3DB/Dropbox/Dropbox/consultant/app/views/taxonomies/index.html.erb:20:in `_run_erb_app47views47taxonomies47index46html46erb'
/Users/lawrencescott/Desktop/Clean up/S3DB/Dropbox/Dropbox/consultant/app/views/taxonomies/index.html.erb:18:in `each'
/Users/lawrencescott/Desktop/Clean up/S3DB/Dropbox/Dropbox/consultant/app/views/taxonomies/index.html.erb:18:in `_run_erb_app47views47taxonomies47index46html46erb'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:34:in `send'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:34:in `render'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:306:in `with_template'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_view/renderable.rb:30:in `render'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_view/template.rb:205:in `render_template'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:265:in `render'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:348:in `_render_with_layout'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_view/base.rb:262:in `render'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1250:in `render_for_file'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:951:in `render_without_benchmark'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:51:in `render'
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms'
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:51:in `render'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/mime_responds.rb:135:in `send'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/mime_responds.rb:135:in `custom'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/mime_responds.rb:179:in `call'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/mime_responds.rb:179:in `respond'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/mime_responds.rb:173:in `each'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/mime_responds.rb:173:in `respond'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/mime_responds.rb:107:in `respond_to'
/Users/lawrencescott/Desktop/Clean up/S3DB/Dropbox/Dropbox/consultant/app/controllers/taxonomies_controller.rb:7:in `index'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1331:in `send'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:1331:in `perform_action_without_filters'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:617:in `call_filters'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:610:in `perform_action_without_benchmark'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms'
/Library/Ruby/Gems/1.8/gems/activesupport-2.3.5/lib/active_support/core_ext/benchmark.rb:17:in `ms'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/benchmarking.rb:68:in `perform_action_without_rescue'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/rescue.rb:160:in `perform_action_without_flash'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/flash.rb:146:in `perform_action'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `send'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:532:in `process_without_filters'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/filters.rb:606:in `process'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:391:in `process'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/base.rb:386:in `call'
/Library/Ruby/Gems/1.8/gems/actionpack-2.3.5/lib/action_controller/routing/route_set.rb:437:in `call'
Request

Parameters:

None
Show session dump

Response

Headers:

{"Content-Type"=>"text/html",
 "Cache-Control"=>"no-cache"}