nested resources

resourcesを以下のようにネストした場合

```
resources :projects, :replace_id_with => 'project_id' do
    resources :members
end
```

routesが以下のようになりますが

```
$ rake routes
    project_members GET    /projects/:project_project_id/members(.:format)          members#index
                    POST   /projects/:project_project_id/members(.:format)          members#create
 new_project_member GET    /projects/:project_project_id/members/new(.:format)      members#new
edit_project_member GET    /projects/:project_project_id/members/:id/edit(.:format) members#edit
     project_member GET    /projects/:project_project_id/members/:id(.:format)      members#show
                    PUT    /projects/:project_project_id/members/:id(.:format)      members#update
                    DELETE /projects/:project_project_id/members/:id(.:format)      members#destroy
           projects GET    /projects(.:format)                                      projects#index
                    POST   /projects(.:format)                                      projects#create
        new_project GET    /projects/new(.:format)                                  projects#new
       edit_project GET    /projects/:project_id/edit(.:format)                     projects#edit
            project GET    /projects/:project_id(.:format)                          projects#show
                    PUT    /projects/:project_id(.:format)                          projects#update
                    DELETE /projects/:project_id(.:format)                          projects#destroy
```

id を変更することで重複する可能性は減りますので、以下のように `singular` を付けない形の方がいいのではと思いますが如何でしょう？

```
$ rake routes
    project_members GET    /projects/:project_id/members(.:format)          members#index
                    POST   /projects/:project_id/members(.:format)          members#create
 new_project_member GET    /projects/:project_id/members/new(.:format)      members#new
edit_project_member GET    /projects/:project_id/members/:id/edit(.:format) members#edit
     project_member GET    /projects/:project_id/members/:id(.:format)      members#show
                    PUT    /projects/:project_id/members/:id(.:format)      members#update
                    DELETE /projects/:project_id/members/:id(.:format)      members#destroy
           projects GET    /projects(.:format)                              projects#index
                    POST   /projects(.:format)                              projects#create
        new_project GET    /projects/new(.:format)                          projects#new
       edit_project GET    /projects/:project_id/edit(.:format)             projects#edit
            project GET    /projects/:project_id(.:format)                  projects#show
                    PUT    /projects/:project_id(.:format)                  projects#update
                    DELETE /projects/:project_id(.:format)                  projects#destroy
```

もし賛同して頂けるようであれば取り込んでもらえると嬉しいです。