updated tests, switched to rails 3.0.0rc2

app/models/post_vote.rb

@@ -2,15 +2,5 @@ class PostVote < ActiveRecord::Base
   class Error < Exception ; end
   
   attr_accessor :is_positive
-  validates_uniqueness_of :ip_addr, :scope => :post_id
-  after_save :update_post_score
   belongs_to :post
-  
-  def update_post_score
-    if is_positive
-      post.increment!(:score)
-    else
-      post.decrement!(:score)
-    end
-  end
 end