Named scopes for comments: in_order, recent, limit.

lib/comment_methods.rb

@@ -1,8 +1,17 @@
 module ActsAsCommentable
+  # including this module into your Comment model will give you finders and named scopes
+  # useful for working with Comments.
+  # The named scopes are:
+  #   in_order: Returns comments in the order they were created (created_at ASC).
+  #   recent: Returns comments by how recently they were created (created_at DESC).
+  #   limit(N): Return no more than N comments.
   module Comment
 
     def self.included(comment_model)
       comment_model.extend Finders
+      comment_model.named_scope :in_order, {:order => 'created_at ASC'}
+      comment_model.named_scope :recent, {:order => "created_at DESC"}
+      comment_model.named_scope :limit, lambda {|limit| {:limit => limit}}
     end
 
     module Finders