更新历史版本，下载次数，引用次数不清零

app/controllers/attachments_controller.rb

@@ -251,7 +251,7 @@ class AttachmentsController < ApplicationController
       @history.version =  @old_history.nil? ? 1 :  @old_history.version + 1
       @history.save  #历史记录保存完毕
       #将最新保存的记录 数据替换到 需要修改的文件记录
-      @old_attachment.attributes = @attachment.attributes.dup.except("id","container_id","container_type","is_public","downloads")
+      @old_attachment.attributes = @attachment.attributes.dup.except("id","container_id","container_type","is_public","downloads", "quotes")
       @old_attachment.save
       #删除当前记录
       @attachment.delete