adding messaging function, needs tests...

app/models/message.rb

@@ -1,5 +1,10 @@
 class Message < ActiveRecord::Base
   belongs_to :user
   attr_accessible :creator_id, :message, :read, :receiver_id
-  
+  validates_presence_of :creator_id, :receiver_id, :message
+
+  def creator_name
+    creator = User.where(:id => self.creator_id).first
+    creator.full_name
+  end
 end

app/models/user.rb

@@ -17,7 +17,7 @@ class User < ActiveRecord::Base
   has_one :paid_time_off, :foreign_key => :user_id, :primary_key => :user_id, :dependent => :destroy
   has_one :work_info, :foreign_key => :user_id, :primary_key => :user_id, :dependent => :destroy
   has_many :performance, :foreign_key => :user_id, :primary_key => :user_id, :dependent => :destroy
-  has_many :message, :foreign_key => :receiver_id, :dependent => :destroy
+  has_many :messages, :foreign_key => :receiver_id, :primary_key => :user_id, :dependent => :destroy
 
 
   def build_benefits_data