diff --git a/app/models/scrap.rb b/app/models/scrap.rb
index 5fd1b4b..ea57fb5 100644
--- a/app/models/scrap.rb
+++ b/app/models/scrap.rb
@@ -1,4 +1,7 @@
 class Scrap < ActiveRecord::Base
+
+  attr_accessible :content, :sender_id, :receiver_id, :scrap_id
+
   SEARCHABLE_FIELDS = {
     :content => 1,
   }
diff --git a/test/unit/scrap_notifier_test.rb b/test/unit/scrap_notifier_test.rb
index 1b1cae5..39f1dc3 100644
--- a/test/unit/scrap_notifier_test.rb
+++ b/test/unit/scrap_notifier_test.rb
@@ -14,44 +14,44 @@ class ScrapNotifierTest < ActiveSupport::TestCase
 
   should 'deliver mail after leave scrap' do
     assert_difference ActionMailer::Base.deliveries, :size do
-      Scrap.create!(:sender => @sender, :receiver => @receiver, :content => 'Hi man!')
+      Scrap.create!(:sender_id => @sender.id, :receiver_id => @receiver.id, :content => 'Hi man!')
     end
   end
 
   should 'deliver mail even if it is a reply' do
-    s = Scrap.create!(:sender => @sender, :receiver => @receiver, :content => 'Hi man!')
+    s = Scrap.create!(:sender_id => @sender.id, :receiver_id => @receiver.id, :content => 'Hi man!')
     assert_difference ActionMailer::Base.deliveries, :size do
-      s.replies << Scrap.new(:sender => @sender, :receiver => @receiver, :content => 'Hi again man!')
+      s.replies << Scrap.new(:sender_id => @sender.id, :receiver_id => @receiver.id, :content => 'Hi again man!')
     end
   end
 
   should 'deliver mail to receiver of the scrap' do
-    Scrap.create!(:sender => @sender, :receiver => @receiver, :content => 'Hi man!')
+    Scrap.create!(:sender_id => @sender.id, :receiver_id => @receiver.id, :content => 'Hi man!')
     sent = ActionMailer::Base.deliveries.first
     assert_equal [@receiver.email], sent.to
   end
 
   should 'display sender name in delivered mail' do
-    Scrap.create!(:sender => @sender, :receiver => @receiver, :content => 'Hi man!')
+    Scrap.create!(:sender_id => @sender.id, :receiver_id => @receiver.id, :content => 'Hi man!')
     sent = ActionMailer::Base.deliveries.first
     assert_match /user_scrap_sender_test/, sent.body
   end
 
   should 'display scrap content in delivered mail' do
-    Scrap.create!(:sender => @sender, :receiver => @receiver, :content => 'Hi man!')
+    Scrap.create!(:sender_id => @sender.id, :receiver_id => @receiver.id, :content => 'Hi man!')
     sent = ActionMailer::Base.deliveries.first
     assert_match /Hi man!/, sent.body
   end
 
   should 'display receiver wall link in delivered mail' do
-    Scrap.create!(:sender => @sender, :receiver => @receiver, :content => 'Hi man!')
+    Scrap.create!(:sender_id => @sender.id, :receiver_id => @receiver.id, :content => 'Hi man!')
     sent = ActionMailer::Base.deliveries.first
     assert_match /\/profile\/user_scrap_receiver_test#profile-wall/, sent.body
   end
 
   should 'not deliver mail if notify receiver and sender are the same person' do
     assert_no_difference ActionMailer::Base.deliveries, :size do
-      Scrap.create!(:sender => @sender, :receiver => @sender, :content => 'Hi myself!')
+      Scrap.create!(:sender_id => @sender.id, :receiver_id => @sender.id, :content => 'Hi myself!')
     end
   end
 
@@ -60,7 +60,7 @@ class ScrapNotifierTest < ActiveSupport::TestCase
     person = fast_create(Person)
     scrap = fast_create(Scrap, :receiver_id => community.id, :sender_id => @sender.id)
     assert_no_difference ActionMailer::Base.deliveries, :size do
-      Scrap.create!(:sender => person, :receiver => @sender, :scrap_id => scrap.id, :content => 'Hi myself!')
+      Scrap.create!(:sender_id => person, :receiver_id => @sender.id, :scrap_id => scrap.id, :content => 'Hi myself!')
     end
   end
 
--
libgit2 0.21.2