解决英雄榜两个用户同时存在的but

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

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

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