Question

在routes.rb中：

namespace :account do
  resource :groups
  resource :posts
end

但是找到http://0.0.0.0:3000/account/groups时出错：

***Unknown action
The action 'show' could not be found for Account::GroupsController***

我检查了http://0.0.0.0:3000/rails/info/routes并得到了：

```
account_groups_path          POST    /account/groups(.:format)   account/groups#create
new_account_groups_path      GET     /account/groups/new(.:format)   account/groups#new
edit_account_groups_path     GET     /account/groups/edit(.:format)  account/groups#edit
                             GET     /account/groups(.:format)   account/groups#show
                             PATCH   /account/groups(.:format)   account/groups#update
                             PUT     /account/groups(.:format)   account/groups#update
                             DELETE  /account/groups(.:format)   account/groups#destroy
```

为什么帐户/群组不会映射到索引方法？

Answer 1

如果您只想生成index操作，请更新路径文件，将创建的路线限制为index，如下所示：

namespace :account do
  resource :groups, only: [ :index ]
  resource :posts
end

问题是您的资源声明，您使用 singular resource ，即resource :groups和resource :posts。这样做的是将/account/groups映射到account/groups#show和account/posts#show。多个resource将是一个更好的解决方案：

namespace :account do
  resources :groups
  resources :posts
end

通过此更改，运行rake routes可为您提供所需的index操作。

Rails 4：命名空间下的路由错误

1 个答案: