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使用设计和活动管理员处理一些继承的代码。

我有一个创建 admin_user 的表单（电子邮件、密码、密码确认）单击提交后，浏览器在向我显示 504 之前会挂起。用户已创建并在数据库中。

这个问题突然冒出来了。我所做的少数提交并没有涉及项目的这一部分。

这是创建管理员用户表单的代码。在此之后会发生什么我仍然不清楚：

ActiveAdmin.register AdminUser do     
  menu :parent => "Sys Admin", :priority => 2  

  index do                            
    column :email                     
    column :current_sign_in_at        
    column :last_sign_in_at           
    column :sign_in_count             
    default_actions                   
  end                                 

  filter :email                       

  form do |f|                         
    f.inputs "Admin Details" do       
      f.input :email
      f.input :password               
      f.input :password_confirmation  
    end                               
    f.buttons                         
  end                        

  controller do
    #https://coderwall.com/p/xfrujq
    def update_resource(object, attributes)
      update_method = attributes.first[:password].present? ? :update_attributes : :update_without_password
      object.send(update_method, *attributes)
    end
  end

end   

2013/10/17 11:58:32 [error] 1609#0: *293930 connect() failed (111: Connection refused) while connecting to upstream, client: ***IP****, server: www.*******.com, request: "HEAD / HTTP/1.0", upstream: "http://***IP****:8080/", host: "www.*******.com"
2013/10/17 11:58:46 [error] 1610#0: *293932 connect() failed (111: Connection refused) while connecting to upstream, client: ***IP****, server: www.*******.com, request: "HEAD / HTTP/1.0", upstream: "http://***IP****:8080/", host: "www.*******.com"
2013/10/17 11:58:50 [error] 1610#0: *293934 connect() failed (111: Connection refused) while connecting to upstream, client: ***IP****, server: www.*******.com, request: "HEAD / HTTP/1.0", upstream: "http://***IP****:8080/", host: "www.*******.com"
2013/10/17 11:59:23 [error] 1610#0: *293936 connect() failed (111: Connection refused) while connecting to upstream, client: ***IP****, server: www.*******.com, request: "HEAD / HTTP/1.0", upstream: "http://***IP****:8080/", host: "www.*******.com"
2013/10/17 11:59:47 [error] 1610#0: *293938 connect() failed (111: Connection refused) while connecting to upstream, client: ***IP****, server: www.*******.com, request: "GET /*****/4960 HTTP/1.1", upstream: "http://***IP****:8080/*****/4960", host: "www.*******.com", referrer: "https://www.*******.com/*****/4960"
2013/10/17 11:59:48 [error] 1610#0: *293938 connect() failed (111: Connection refused) while connecting to upstream, client: ***IP****, server: www.*******.com, request: "GET /*****/assets/btn_menu_close.png HTTP/1.1", upstream: "http://***IP****:8080/*****/assets/btn_menu_close.png", host: "www.*******.com", referrer: "https://www.*******.com/*****/4960"
2013/10/17 12:30:12 [error] 1611#0: *294268 open() "/home/deployer/apps/*******/current/public/assets/wufoo.js" failed (2: No such file or directory), client: ***IP****, server: www.*******.com, request: "GET /assets/wufoo.js HTTP/1.1", host: "www.*******.com", referrer: "https://www.*******.com/pioneer"
2013/10/17 12:38:17 [error] 1610#0: *294379 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "POST /admin/admin_users HTTP/1.1", upstream: "http://***IP****:8080/admin/admin_users", host: "www.*******.com", referrer: "https://www.*******.com/admin/admin_users/new"
2013/10/17 12:40:05 [error] 1610#0: *294404 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "GET /patients HTTP/1.1", upstream: "http://***IP****:8080/patients", host: "www.*******.com", referrer: "https://www.*******.com/users/sign_in"
2013/10/17 13:14:28 [error] 1608#0: *294872 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "GET /api/v1/*****/2018/**_*****.json HTTP/1.1", upstream: "http://***IP****:8080/api/v1/*****/2018/**_*****.json", host: "www.*******.com"
2013/10/17 13:15:45 [error] 1609#0: *295095 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "GET /api/v1/*****/2224/**_*****.json HTTP/1.1", upstream: "http://***IP****:8080/api/v1/*****/2224/**_*****.json", host: "www.*******.com"
2013/10/17 13:17:34 [error] 1608#0: *295160 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "GET /api/v1/medications.json HTTP/1.1", upstream: "http://***IP****:8080/api/v1/medications.json", host: "www.*******.com"
2013/10/17 13:20:51 [error] 1609#0: *295800 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "GET /api/v1/*****/3698/**_*****.json HTTP/1.1", upstream: "http://***IP****:8080/api/v1/*****/3698/**_*****.json", host: "www.*******.com"
2013/10/17 13:58:21 [error] 1608#0: *298069 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "GET /api/v1/*****/3457/**_*****.json HTTP/1.1", upstream: "http://***IP****:8080/api/v1/*****/3457/**_*****.json", host: "www.*******.com"
2013/10/17 16:44:39 [error] 1611#0: *301472 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "POST /admin/admin_users HTTP/1.1", upstream: "http://***IP****:8080/admin/admin_users", host: "www.*******.com", referrer: "https://www.*******.com/admin/admin_users/new"
2013/10/17 19:09:24 [error] 1608#0: *302423 upstream prematurely closed connection while reading response header from upstream, client: ***IP****, server: www.*******.com, request: "POST /api/v1/images/4650/upload_file.json HTTP/1.1", upstream: "http://***IP****:8080/api/v1/images/4650/upload_file.json", host: "www.*******.com"
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