用户修改资料保存报错

app/controllers/my_controller.rb

@@ -122,7 +122,7 @@ class MyController < ApplicationController
 
         if @user.save && @se.save
           # 头像保存
-          FileUtils.mv diskfile1, diskfile, force: true
+          FileUtils.mv diskfile1, diskfile, force: true if File.exist? diskfile1
           @user.pref.save
           @user.notified_project_ids = (@user.mail_notification == 'selected' ? params[:notified_project_ids] : [])
           set_language_if_valid @user.language