ActionController::RoutingError (没有路由匹配 [POST] "/users")答案

【问题标题】：ActionController::RoutingError (No route matches [POST] "/users")ActionController::RoutingError (没有路由匹配 [POST] "/users")
【发布时间】：2020-02-17 20:17:42
【问题描述】：

我已经使用开发环境测试了我的项目，一切正常，但是在我将项目上传到主机后，我收到了这个错误。

# log
[2020-02-17T14:54:55.319109 #2097106]  INFO -- : [2ac848c8-15f3-47fd-ad77-ede940b1502e] Started POST "/admin/users" for my_server_ip at 2020-02-17 14:54:55 -0500
[2020-02-17T14:54:55.320555 #2097106] FATAL -- : [2ac848c8-15f3-47fd-ad77-ede940b1502e]   
[2ac848c8-15f3-47fd-ad77-ede940b1502e] ActionController::RoutingError (No route matches [POST] "/users"):
[2ac848c8-15f3-47fd-ad77-ede940b1502e]   
[2ac848c8-15f3-47fd-ad77-ede940b1502e] actionpack (6.0.2.1) lib/action_dispatch/middleware/debug_exceptions.rb:36:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] actionpack (6.0.2.1) lib/action_dispatch/middleware/show_exceptions.rb:33:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] railties (6.0.2.1) lib/rails/rack/logger.rb:38:in `call_app'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] railties (6.0.2.1) lib/rails/rack/logger.rb:26:in `block in call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] activesupport (6.0.2.1) lib/active_support/tagged_logging.rb:80:in `block in tagged'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] activesupport (6.0.2.1) lib/active_support/tagged_logging.rb:28:in `tagged'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] activesupport (6.0.2.1) lib/active_support/tagged_logging.rb:80:in `tagged'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] railties (6.0.2.1) lib/rails/rack/logger.rb:26:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] actionpack (6.0.2.1) lib/action_dispatch/middleware/remote_ip.rb:81:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] actionpack (6.0.2.1) lib/action_dispatch/middleware/request_id.rb:27:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] rack (2.1.2) lib/rack/method_override.rb:24:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] rack (2.1.2) lib/rack/runtime.rb:24:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] activesupport (6.0.2.1) lib/active_support/cache/strategy/local_cache_middleware.rb:29:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] actionpack (6.0.2.1) lib/action_dispatch/middleware/executor.rb:14:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] actionpack (6.0.2.1) lib/action_dispatch/middleware/static.rb:126:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] rack (2.1.2) lib/rack/sendfile.rb:113:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] actionpack (6.0.2.1) lib/action_dispatch/middleware/host_authorization.rb:83:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] railties (6.0.2.1) lib/rails/engine.rb:526:in `call'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] /opt/passenger-5.3.7-2.el7.cloudlinux/src/ruby_supportlib/phusion_passenger/rack/thread_handler_extension.rb:97:in `process_request'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] /opt/passenger-5.3.7-2.el7.cloudlinux/src/ruby_supportlib/phusion_passenger/request_handler/thread_handler.rb:157:in `accept_and_process_next_request'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] /opt/passenger-5.3.7-2.el7.cloudlinux/src/ruby_supportlib/phusion_passenger/request_handler/thread_handler.rb:110:in `main_loop'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] /opt/passenger-5.3.7-2.el7.cloudlinux/src/ruby_supportlib/phusion_passenger/request_handler.rb:415:in `block (3 levels) in start_threads'
[2ac848c8-15f3-47fd-ad77-ede940b1502e] /opt/passenger-5.3.7-2.el7.cloudlinux/src/ruby_supportlib/phusion_passenger/utils.rb:113:in `block in create_thread_and_abort_on_exception'

这是我的路线

# config/routes.rb
namespace :admin do
  resources :users
end

这是我的表格

# app/views/admin/users/index.html.erb
<%= form_with(model: admin_user, local: true) do |form| %>

  # my form inputs

  <%= form.submit class: 'btn btn-dark' %>

<% end %>

【问题讨论】：

标签： ruby-on-rails ruby rubygems rails-routing ruby-on-rails-6

【解决方案1】：

$ rails routes的输出：

                           Prefix Verb   URI Pattern                                                                              Controller#Action
                      admin_users GET    /admin/users(.:format)                                                                   admin/users#index
                                  POST   /admin/users(.:format)                                                                   admin/users#create
                   new_admin_user GET    /admin/users/new(.:format)                                                               admin/users#new
                  edit_admin_user GET    /admin/users/:id/edit(.:format)                                                          admin/users#edit
                       admin_user GET    /admin/users/:id(.:format)                                                               admin/users#show
                                  PATCH  /admin/users/:id(.:format)                                                               admin/users#update
                                  PUT    /admin/users/:id(.:format)                                                               admin/users#update
                                  DELETE /admin/users/:id(.:format)                                                               admin/users#destroy

如果您尝试从需要使用的表单路由到此：

<%= form_with(model: [:admin, @user]) do |f| %>

见：

【讨论】：

对不起@max，但我的主机不提供终端，所以我无法在主机中运行rails routes，但是当我在本地机器上运行时，我得到了相同的路线，请查看我的新更新'已添加表单
如果你想路由到那个路由，你需要使用'form_with(model: [:admin, admin_user])'。如果您查看链接的文档或尝试复制它，那一天就很清楚了。我猜这里的开发和生产之间的差异是由于方法不好。您可能没有运行相同的代码，或者您的测试缺少并且没有发现问题。

【解决方案2】：

您创建的路由在命名空间admin 下，但您正在向/users 发出 pos 请求。

用/admin/users尝试同样的请求。

【讨论】：

表单动作路由请求admin/users，但报错只显示/users