From: thundercleesed@...
Date: 2006-02-06T02:08:20+09:00
Subject: Cookbook2 tutorial error:  The error occured while evaluating nil.name

I am following the Cookbook2 tutorial on the InstantRails website (
http://instantrails.rubyforge.org/tutorial/index.html ).  I am almost
finshed with the tutorial but have started getting the following error:

 NoMethodError in Recipe#list

Showing app/views/recipe/list.rhtml where line #24 raised:

You have a nil object when you didn't expect it!
The error occured while evaluating nil.name

Extracted source (around line #24):

21:  :confirm => "Really delete #{recipe.title}?" %>
22:  </font>
23:  </td>
24:  <td><%= recipe.category.name %></td>
25:  <td><%= recipe.date %></td>
26:  </tr>
27:  <% end %>

RAILS_ROOT: ./script/../config/..
Application Trace | Framework Trace | Full Trace

#{RAILS_ROOT}/app/views/recipe/list.rhtml:24
#{RAILS_ROOT}/app/views/recipe/list.rhtml:11


And here are the first three lines of the Full Trace:


C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_view/base.rb:268:in
`compile_and_render_template'
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_view/base.rb:244:in
`render_template'
C:/InstantRails/ruby/lib/ruby/gems/1.8/gems/actionpack-1.11.2/lib/action_view/base.rb:205:in
`render_file'

I have attempted double checking the code throughout the tutorial, but
I am just not seeing what is causing the error.  I figure it is a small
typing error, but I do not know how to isolate which section of code it
is in.  Any suggestions would be welcomed.

Thank you for your time.

John