added news updates ui

app/models/news_update.rb

@@ -0,0 +1,15 @@
+class NewsUpdate < ActiveRecord::Base
+  belongs_to :creator, :class_name => "User"
+  belongs_to :udpater, :class_name => "User"
+  scope :recent, order("created_at desc").limit(5)
+  before_validation :initialize_creator, :on => :create
+  before_validation :initialize_updater
+  
+  def initialize_creator
+    self.creator_id = CurrentUser.id
+  end
+  
+  def initialize_updater
+    self.updater_id = CurrentUser.id
+  end
+end