リソースのCRUDについては、Rails Guildの2.2 CRUD, Verbs, and Actionsにまとめられています。

よく使うところを抜粋してまとめてみます。

普通のリソース

resource :photos

HTTP Verb	Path	action	Named Helper
GET	/photos	index	photos_path
GET	/photos/new	new	new_photo_path
POST	/photos	create	photos_path
GET	/photos/:id	show	edit_photo_patth(@photo)
GET	/photos/:id/edit	edit	photo_patth(@photo)
PUT	/photos/:id	update	photo_patth(@photo)
DELETE	/photos/:id	destroy	photo_patth(@photo)

resourcesに独自のパスを追加

resources: :posts do
  comment "/comment", on: :collection
end

このときのNamed パスは

comment_posts_path

 

namespeceを使った場合

namespace :admin do
  resources :posts, :comments
end

HTTP Verb	Path	action	named helper
GET	/admin/posts	index	admin_posts_path
GET	/admin/posts/new	new	new_admin_post_path
POST	/admin/posts	create	admin_posts_path
GET	/admin/posts/:id	show	admin_post_path(:id)
GET	/admin/posts/:id/edit	edit	edit_admin_post_path(:id)
PUT	/admin/posts/:id	update	admin_post_path(:id)
DELETE	/admin/posts/:id	destroy	admin_post_path(:id)