更新账号问题

app/controllers/managements_controller.rb

@@ -221,7 +221,9 @@ class ManagementsController < ApplicationController
           @user.admin = params[:admin].to_i
         end
         @user.firstname = ""
-        @user.mail = params[:mail].strip == "" ? nil : params[:mail]
+        if params[:mail].present?
+          @user.mail = params[:mail].strip
+        end
         @user.phone = params[:phone].strip == "" ? nil : params[:phone]
         #@user.password = params[:new_password]
         # if params[:new_password].strip != "" && params[:new_password_confirmation].strip != ""