ActsAsArchivable
================
 
ActsAsArchivable is a collection of methods that I found myself using quite a bit related 
to models with time-stamped columns.  Initial things were blog entries in regards to archives, 
but I found that I was using these more and more in various ways throughout many models.
 
This library requires ActiveRecord.
 
  class Entry < ActiveRecord::Base
    acts_as_archivable :order => 'DESC'
    has_many  :comments, :dependent => :destroy
  end
 
  class Comment < ActiveRecord::Base
    acts_as_archivable :on => :replied_on
    belongs_to  :entry
  end
 
From here, you have quick access to records related to date.
 
  Entry.by_date :year => 2007
  Entry.by_date Date.today
  Entry.by_date '5/1/2007'
 
  Entry.oldest
  Entry.newest
 
  Entry.recent 2.weeks
  Entry.recent 3.months
  Entry.recent (3.months - 1.week)
 
  Entry.between '5/10/2007', Date.today