Add to_model method to session

Signed-off-by: Ben Johnson <bjohnson@binarylogic.com>

lib/authlogic/session/active_record_trickery.rb

@@ -50,6 +50,11 @@ module InstanceMethods
         def new_record?
           new_session?
         end
+
+        # For rails >= 3.0
+        def to_model
+          self
+        end
       end
     end
   end

test/session_test/active_record_trickery_test.rb

@@ -15,13 +15,22 @@ def test_human_name
       def test_self_and_descendents_from_active_record
         assert_equal [UserSession], UserSession.self_and_descendents_from_active_record
       end
+
+      def test_self_and_descendants_from_active_record
+        assert_equal [UserSession], UserSession.self_and_descendants_from_active_record
+      end
     end
 
     class InstanceMethodsTest < ActiveSupport::TestCase
       def test_new_record
         session = UserSession.new
         assert session.new_record?
       end
+
+      def test_to_model
+        session = UserSession.new
+        assert session, session.to_model
+      end
     end
   end
-end
+end