* Missing files

* Work on post exploration code by traversing dates

app/models/post_vote.rb

@@ -1,6 +1,20 @@
 class PostVote < ActiveRecord::Base
   class Error < Exception ; end
   
-  attr_accessor :is_positive
   belongs_to :post
+  before_validation :initialize_user, :on => :create
+  validates_presence_of :post_id, :user_id, :score
+  validates_inclusion_of :score, :in => [1, -1]
+
+  def score=(x)
+    if x == "up"
+      write_attribute(:score, 1)
+    elsif x == "down"
+      write_attribute(:score, -1)
+    end
+  end
+  
+  def initialize_user
+    self.user_id = CurrentUser.user.id
+  end
 end