class Message < ActiveRecord::Base
belongs_to :sender, :class_name => "User", :foreign_key => :from_user_id
belongs_to :recipient, :class_name => "User", :foreign_key => :to_user_id
validates_presence_of :title, :body, :sent_on, :sender, :recipient
class Message < ActiveRecord::Base
belongs_to :sender, :class_name => "User", :foreign_key => :from_user_id
belongs_to :recipient, :class_name => "User", :foreign_key => :to_user_id
validates_presence_of :title, :body, :sent_on, :sender, :recipient