I have updated the documentation according to ticket rails#4263 about…

… fixtures and set_fixture_class

Signed-off-by: José Valim <jose.valim@gmail.com>

railties/guides/source/active_record_basics.textile

@@ -104,6 +104,14 @@ class Product < ActiveRecord::Base
   set_table_name "PRODUCT"
 end
 </ruby>
+If you do so, you will have to define manually the class name that is hosting the fixtures (class_name.yml) using the +set_fixture_class+ method in your test definition:
+<ruby>
+class FunnyJoke < ActiveSupport::TestCase
+  set_fixture_class :funny_jokes => 'Joke'
+  fixtures :funny_jokes
+  ...
+end
+</ruby>
 
 It's also possible to override the column that should be used as the table's primary key. Use the +ActiveRecord::Base.set_primary_key+ method for that:
 <ruby>
@@ -201,4 +209,4 @@ Active Record callbacks allow you to attach code to certain events in the life-c
 
 h3. Migrations
 
-Rails provides a domain-specific language for managing a database schema called migrations. Migrations are stored in files which are executed against any database that Active Record support using rake. Rails keeps track of which files have been committed to the database and provides rollback features. You can learn more about migrations in the "Active Record Migrations guide":migrations.html
+Rails provides a domain-specific language for managing a database schema called migrations. Migrations are stored in files which are executed against any database that Active Record support using rake. Rails keeps track of which files have been committed to the database and provides rollback features. You can learn more about migrations in the "Active Record Migrations guide":migrations.html