include friend_request in jam_ruby

lib/jam_ruby.rb

@@ -11,6 +11,7 @@ require "jam_ruby/models/band"
 require "jam_ruby/models/connection"
 require "jam_ruby/models/friendship"
 require "jam_ruby/models/music_session"
+require "jam_ruby/models/friend_request"
 
 include Jampb
 

lib/jam_ruby/models/friend_request.rb

@@ -3,8 +3,15 @@ module JamRuby
 
     self.primary_key = 'id'
 
-    belongs_to :user
+    belongs_to :user, :class_name => "JamRuby::User"
     belongs_to :friend, :class_name => "JamRuby::User"
 
+    validates :user_id, :presence => true
+    validates :friend_id, :presence => true
+
+    def to_s
+      return "#{self.user.to_s}:#{self.friend.to_s}"
+    end
+
   end
 end