迁移文件修改

db/migrate/20150906083453_delete_anonymous_jour.rb

@@ -1,13 +1,6 @@
 class DeleteAnonymousJour < ActiveRecord::Migration
   def up
-    jour_count = Journal.all.count / 30 + 2
-    transaction do
-      for i in 1 ... jour_count do i
-      Journal.page(i).per(30).each do |jour|
-        jour.destroy if jour.user_id == 2
-      end
-      end
-    end
+    Journal.where("user_id = 2").destroy_all
   end
 
   def down

db/migrate/20150906090419_delete_anonymous_feedback.rb

@@ -1,13 +1,6 @@
 class DeleteAnonymousFeedback < ActiveRecord::Migration
   def up
-    jour_count = JournalsForMessage.all.count / 30 + 2
-    transaction do
-      for i in 1 ... jour_count do i
-      JournalsForMessage.page(i).per(30).each do |jour|
-        jour.destroy if jour.user_id.to_s == "2"
-      end
-      end
-    end
+    JournalsForMessage.where("user_id = 2").destroy_all
   end
 
   def down

db/migrate/20150906091723_delete_anonymous_message.rb

@@ -1,13 +1,6 @@
 class DeleteAnonymousMessage < ActiveRecord::Migration
   def up
-    message_count = Message.all.count / 30 + 2
-    transaction do
-      for i in 1 ... message_count do i
-      Message.page(i).per(30).each do |message|
-        message.destroy if jour.author_id.to_s == "2"
-      end
-      end
-    end
+    Message.where("author_id = 2").destroy_all
   end
 
   def down