diff --git a/app/models/journals_for_message.rb b/app/models/journals_for_message.rb
index ec6390408..96853d1c7 100644
--- a/app/models/journals_for_message.rb
+++ b/app/models/journals_for_message.rb
@@ -267,7 +267,7 @@ class JournalsForMessage < ActiveRecord::Base
 
   # 课程成员得分（英雄榜）
   def act_as_student_score
-    unless self.user.allowed_to?(:as_teacher, self.jour)
+    if !self.user.allowed_to?(:as_teacher, self.jour) 
       course_member_score(self.jour_id, self.user_id, "JournalForMessage")
     end
   end
diff --git a/db/migrate/20151215070238_delete_validate_course_contributor.rb b/db/migrate/20151215070238_delete_validate_course_contributor.rb
new file mode 100644
index 000000000..704ca893d
--- /dev/null
+++ b/db/migrate/20151215070238_delete_validate_course_contributor.rb
@@ -0,0 +1,13 @@
+class DeleteValidateCourseContributor < ActiveRecord::Migration
+  def up
+    course_contributors = CourseContributorScore.where("course_id>? and created_at<? ", 450, "2015-12-15 19:51:48")
+    course_contributors.delete_all
+    c170 = CourseContributorScore.where("course_id =?", 170)
+    c170.delete_all
+    c436 = CourseContributorScore.where("course_id =?", 436)
+    c436.delete_all
+  end
+
+  def down
+  end
+end
diff --git a/db/schema.rb b/db/schema.rb
index 17e613acb..5f53dd5cf 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -11,7 +11,7 @@
 #
 # It's strongly recommended to check this file into your version control system.
 
-ActiveRecord::Schema.define(:version => 20151209085942) do
+ActiveRecord::Schema.define(:version => 20151215070238) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false