修复: 合并从develop

app/controllers/users_controller.rb

@@ -305,7 +305,6 @@ class UsersController < ApplicationController
   def email_search 
     return render_error('请输入email') if params[:email].blank?
     @user = User.find_by(mail: params[:email])
-    return render_not_found unless @user.present?
   end
 
   private

app/views/users/email_search.json.jbuilder

@@ -1 +1,5 @@
-json.partial! 'users/user', locals: { user: @user }
+if @user.present?
+  json.partial! 'users/user', locals: { user: @user }
+else 
+  json.null 
+end