Article:
  Rolling with Ruby on Rails
Subject:   Action Control:Exception caught
Date:   2006-03-30 07:58:35
From:   curth
Response to: Action Control:Exception caught

The recipe you are trying to display probably does not have a category assigned to it -- check your database. If the category_id field is null, then "recipe.category" will return the value "nil" instead of a category object, and since the "nil" object doesn't have a "name" method, you get this error.