删除匿名用户在缺陷中的回复

db/migrate/20150906083453_delete_anonymous_jour.rb

@@ -0,0 +1,15 @@
+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
+  end
+
+  def down
+  end
+end