Add new utility method for an issue to know whether it is being reassigned

app/models/issue.rb

@@ -27,7 +27,7 @@ class Issue < ActiveRecord::Base
   validates :title,
             :presence => true,
             :length   => { :within => 0..255 }
-            
+
   validates :description,
             :length   => { :within => 0..2000 }
 
@@ -55,6 +55,15 @@ class Issue < ActiveRecord::Base
   def new?
     today? && created_at == updated_at
   end
+
+  # Return the number of +1 comments (upvotes)
+  def upvotes
+    notes.select(&:upvote?).size
+  end
+
+  def is_being_reassigned?
+    assignee_id_changed?
+  end
 end
 # == Schema Information
 #