Query guide: class methods are still available on associations

railties/guides/source/active_record_querying.textile

@@ -801,7 +801,11 @@ class Post < ActiveRecord::Base
 end
 </ruby>
 
-Using a class method is the preferred way to accept arguments for scopes.
+Using a class method is the preferred way to accept arguments for scopes. These methods will still be accessible on the association objects:
+
+<ruby>
+category.posts.1_week_before(time)
+</ruby>
 
 h3. Dynamic Finders