删除空的课程动态

db/migrate/20151019085603_update_attachments.rb

@@ -1,23 +0,0 @@
-class UpdateAttachments < ActiveRecord::Migration
-  def up
-    count = Attachment.all.count / 30 + 2
-    transaction do
-      for i in 1 ... count do i
-        Attachment.page(i).per(30).each do |attachment|
-          if attachment.container_type == 'Course'
-            course = attachment.course
-            if course
-              if course.is_public == 0
-                attachment.is_public = 0
-                attachment.save
-              end
-            end
-          end
-        end
-      end
-    end
-  end
-
-  def down
-  end
-end

db/migrate/20151020013352_update_attachment.rb

@@ -0,0 +1,23 @@
+class UpdateAttachment < ActiveRecord::Migration
+  def up
+    count = Attachment.all.count / 30 + 2
+    transaction do
+      for i in 1 ... count do i
+      Attachment.page(i).per(30).each do |attachment|
+        if attachment.container_type == 'Course'
+          course = attachment.course
+          if course
+            if course.is_public == 0
+              attachment.is_public = 0
+              attachment.save
+            end
+          end
+        end
+      end
+      end
+    end
+  end
+
+  def down
+  end
+end

db/migrate/20151020014759_delete_null_course_activity.rb

@@ -0,0 +1,17 @@
+class DeleteNullCourseActivity < ActiveRecord::Migration
+  def up
+    count = CourseActivity.all.count / 30 + 2
+    transaction do
+      for i in 1 ... count do i
+        CourseActivity.page(i).per(30).each do |activity|
+          unless activity.course_act
+            activity.destroy
+          end
+        end
+      end
+    end
+  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 => 20151019085603) do
+ActiveRecord::Schema.define(:version => 20151020014759) do
 
   create_table "activities", :force => true do |t|
     t.integer  "act_id",                                  :null => false