• リソースフルなルーティング
  • 基本
  • actionの制限と除外
  • 単数形リソース
  • namespace
  • scopeによるコントローラーのモジュール指定
  • scopeによるuriのパス指定
  • scopeによるurlヘルパーのprefix指定
  • リソースのネスト
  • リソースの浅いネスト
  • リソースフルルーティングにアクションを追加する
  • コントローラーを変更する
  • urlヘルパーの名前を変更する
  • newとeditのuriを変更する
• リソースフルでないルーティング
  • リソースフルでないルーティングを追加する
  • リソースフルでないルーティングにurlヘルパーを追加する
  • 恒久的なリダイレクト
  • '/'に対するアクセス時に実行するアクションを指定する

リソースフルなルーティング

基本

resources :users

   Prefix Verb   URI Pattern               Controller#Action
    users GET    /users(.:format)          users#index
          POST   /users(.:format)          users#create
 new_user GET    /users/new(.:format)      users#new
edit_user GET    /users/:id/edit(.:format) users#edit
     user GET    /users/:id(.:format)      users#show
          PATCH  /users/:id(.:format)      users#update
          PUT    /users/:id(.:format)      users#update
          DELETE /users/:id(.:format)      users#destroy

actionの制限と除外

  resources :users, only: [:index]

Prefix Verb URI Pattern      Controller#Action
 users GET  /users(.:format) users#index

  resources :users, except: [:index, :edit, :update, :destroy]

  Prefix Verb URI Pattern          Controller#Action
   users POST /users(.:format)     users#create
new_user GET  /users/new(.:format) users#new
    user GET  /users/:id(.:format) users#show

単数形リソース

  # resolveの指定がないと
  # link_to('...', Book.first) のようなコードで
  # books_urlが呼ばれてしまってエラーになる
  # resolveで[:book]を指定することで、book_urlが呼ばれるようになる
  # resolveはモデルのインスタンスから導き出す*_urlや*_pathに影響するだけで
  # ルーティングには影響しない。
  # なので、bin/rails routesの結果はresolveがあってもなくても同じ結果になる。
  resource :book
  resolve('Book') { [:book] }

   Prefix Verb   URI Pattern          Controller#Action
 new_book GET    /book/new(.:format)  books#new
edit_book GET    /book/edit(.:format) books#edit
     book GET    /book(.:format)      books#show
          PATCH  /book(.:format)      books#update
          PUT    /book(.:format)      books#update
          DELETE /book(.:format)      books#destroy
          POST   /book(.:format)      books#create

namespace

  # scope '/admin', as: 'admin', module: 'admin' としても同じ結果になる
  namespace :admin do
    resources :users
  end

         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

  # scope '/admin', as: 'admin', module: 'admin' としても同じ結果になる
  namespace :admin do
    resource :book
  end
  # resolveはnamespaceのブロック内で実行できない
  # URLヘルパーに合わせるために[:admin, :book]にしないといけない
  resolve('Book') { [:admin, :book] }

         Prefix Verb   URI Pattern                Controller#Action
 new_admin_book GET    /admin/book/new(.:format)  admin/books#new
edit_admin_book GET    /admin/book/edit(.:format) admin/books#edit
     admin_book GET    /admin/book(.:format)      admin/books#show
                PATCH  /admin/book(.:format)      admin/books#update
                PUT    /admin/book(.:format)      admin/books#update
                DELETE /admin/book(.:format)      admin/books#destroy
                POST   /admin/book(.:format)      admin/books#create

scopeによるコントローラーのモジュール指定

  # 別の記述方法
  # resources :users, module: 'admin'
  scope module: 'admin' do
    resources :users
  end

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

  # 別の記述方法
  # resource :book, module: 'admin'
  scope module: 'admin' do
    resource :book
  end
  # resolveはscopeのブロック内で実行できない
  # scope module: '...'の場合URLヘルパーにmoduleのprefixはつかないので
  # :book のみでよい
  resolve('Book') { [:book] }

   Prefix Verb   URI Pattern          Controller#Action
 new_book GET    /book/new(.:format)  admin/books#new
edit_book GET    /book/edit(.:format) admin/books#edit
     book GET    /book(.:format)      admin/books#show
          PATCH  /book(.:format)      admin/books#update
          PUT    /book(.:format)      admin/books#update
          DELETE /book(.:format)      admin/books#destroy
          POST   /book(.:format)      admin/books#create

scopeによるURIのパス指定

  # 別の記述方法
  # resources :users, path: '/admin'
  scope '/admin' do
    resources :users
  end

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

  # 別の記述方法
  # resource :book, path: '/admin'
  scope '/admin' do
    resource :book
  end
  # resolveはscopeのブロック内で実行できない
  # scope '...'の場合URLヘルパーにprefixはつかないので
  # :book のみでよい
  resolve('Book') { [:book] }

   Prefix Verb   URI Pattern                Controller#Action
 new_book GET    /admin/book/new(.:format)  books#new
edit_book GET    /admin/book/edit(.:format) books#edit
     book GET    /admin/book(.:format)      books#show
          PATCH  /admin/book(.:format)      books#update
          PUT    /admin/book(.:format)      books#update
          DELETE /admin/book(.:format)      books#destroy
          POST   /admin/book(.:format)      books#create

scopeによるURLヘルパーのprefix指定

  scope as: 'admin' do
    resources :users
  end

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

リソースのネスト

  # 複数形リソース
  resources :users do
    resources :items
    resource :book
  end
  resolve('Book') { [:user, :book] }

        Prefix Verb   URI Pattern                              Controller#Action
    user_items GET    /users/:user_id/items(.:format)          items#index
               POST   /users/:user_id/items(.:format)          items#create
 new_user_item GET    /users/:user_id/items/new(.:format)      items#new
edit_user_item GET    /users/:user_id/items/:id/edit(.:format) items#edit
     user_item GET    /users/:user_id/items/:id(.:format)      items#show
               PATCH  /users/:user_id/items/:id(.:format)      items#update
               PUT    /users/:user_id/items/:id(.:format)      items#update
               DELETE /users/:user_id/items/:id(.:format)      items#destroy
 new_user_book GET    /users/:user_id/book/new(.:format)       books#new
edit_user_book GET    /users/:user_id/book/edit(.:format)      books#edit
     user_book GET    /users/:user_id/book(.:format)           books#show
               PATCH  /users/:user_id/book(.:format)           books#update
               PUT    /users/:user_id/book(.:format)           books#update
               DELETE /users/:user_id/book(.:format)           books#destroy
               POST   /users/:user_id/book(.:format)           books#create
         users GET    /users(.:format)                         users#index
               POST   /users(.:format)                         users#create
      new_user GET    /users/new(.:format)                     users#new
     edit_user GET    /users/:id/edit(.:format)                users#edit
          user GET    /users/:id(.:format)                     users#show
               PATCH  /users/:id(.:format)                     users#update
               PUT    /users/:id(.:format)                     users#update
               DELETE /users/:id(.:format)                     users#destroy

  # 単数形リソース
  # link_to('...', [Book.first, User.first]) のようなコードを記述しても
  # /book/users/BookのID.UserのID
  # となってしまうので、
  # params[:id]はBookのIDで
  # params[:format]がUserのIDになる
  # 素直に
  # link_to('...', book_user_path(User.first))
  # とした方が良い
  resource :book do
    resources :users
  end
  resolve('Book') { [:book] }

        Prefix Verb   URI Pattern                    Controller#Action
    book_users GET    /book/users(.:format)          users#index
               POST   /book/users(.:format)          users#create
 new_book_user GET    /book/users/new(.:format)      users#new
edit_book_user GET    /book/users/:id/edit(.:format) users#edit
     book_user GET    /book/users/:id(.:format)      users#show
               PATCH  /book/users/:id(.:format)      users#update
               PUT    /book/users/:id(.:format)      users#update
               DELETE /book/users/:id(.:format)      users#destroy
      new_book GET    /book/new(.:format)            books#new
     edit_book GET    /book/edit(.:format)           books#edit
          book GET    /book(.:format)                books#show
               PATCH  /book(.:format)                books#update
               PUT    /book(.:format)                books#update
               DELETE /book(.:format)                books#destroy
               POST   /book(.:format)                books#create

リソースの浅いネスト

  resources :users, shallow: true do
    # resource :bookがここにある場合、shallow: trueの有無に関係なく同じルーティングになる
    # scope shallow_path: '...'やscope shallow_prefix: '...'がある場合は別
    resources :items
  end

  # 別の書き方1
  resources :users do
    resources :items, shallow: true
  end

  # 別の書き方2
  shallow do
    resources :users do
      resources :items
    end
  end

  # 別の書き方3
  resources :users do
    resources :items, only: [:index, :new, :create]
  end
  resources :items, only: [:show, :edit, :update, :destroy]

       Prefix Verb   URI Pattern                         Controller#Action
   user_items GET    /users/:user_id/items(.:format)     items#index
              POST   /users/:user_id/items(.:format)     items#create
new_user_item GET    /users/:user_id/items/new(.:format) items#new
    edit_item GET    /items/:id/edit(.:format)           items#edit
         item GET    /items/:id(.:format)                items#show
              PATCH  /items/:id(.:format)                items#update
              PUT    /items/:id(.:format)                items#update
              DELETE /items/:id(.:format)                items#destroy

  scope shallow_path: 'shal' do
    resources :users, shallow: true do
      resources :items
      # 単数形も影響を受ける
      resource :book
    end
  end
  resolve('Book') { [:user, :book] }

  # 別の書き方（resoucesの中にscopeを入れても良い）
  resources :users, shallow: true do
    scope shallow_path: 'shal' do
      resources :items
      # 単数形も影響を受ける
      resource :book
    end
  end

        Prefix Verb   URI Pattern                              Controller#Action
    user_items GET    /shal/users/:user_id/items(.:format)     items#index
               POST   /shal/users/:user_id/items(.:format)     items#create
 new_user_item GET    /shal/users/:user_id/items/new(.:format) items#new
     edit_item GET    /shal/items/:id/edit(.:format)           items#edit
          item GET    /shal/items/:id(.:format)                items#show
               PATCH  /shal/items/:id(.:format)                items#update
               PUT    /shal/items/:id(.:format)                items#update
               DELETE /shal/items/:id(.:format)                items#destroy
 new_user_book GET    /shal/users/:user_id/book/new(.:format)  books#new
edit_user_book GET    /shal/users/:user_id/book/edit(.:format) books#edit
     user_book GET    /shal/users/:user_id/book(.:format)      books#show
               PATCH  /shal/users/:user_id/book(.:format)      books#update
               PUT    /shal/users/:user_id/book(.:format)      books#update
               DELETE /shal/users/:user_id/book(.:format)      books#destroy
               POST   /shal/users/:user_id/book(.:format)      books#create

  # link_to('...', [:shal, Item.first])のような指定をしなければいけない
  scope shallow_prefix: 'shal' do
    resources :users, shallow: true do
      resources :items
      # 単数形も影響を受ける
      resource :book
    end
  end

  # 別の書き方（resoucesの中にscopeを入れても良い）
  resources :users, shallow: true do
    scope shallow_prefix: 'shal' do
      resources :items
      # 単数形も影響を受ける
      resource :book
    end
  end

             Prefix Verb   URI Pattern                         Controller#Action
    shal_user_items GET    /users/:user_id/items(.:format)     items#index
                    POST   /users/:user_id/items(.:format)     items#create
 new_shal_user_item GET    /users/:user_id/items/new(.:format) items#new
     edit_shal_item GET    /items/:id/edit(.:format)           items#edit
          shal_item GET    /items/:id(.:format)                items#show
                    PATCH  /items/:id(.:format)                items#update
                    PUT    /items/:id(.:format)                items#update
                    DELETE /items/:id(.:format)                items#destroy
 new_shal_user_book GET    /users/:user_id/book/new(.:format)  books#new
edit_shal_user_book GET    /users/:user_id/book/edit(.:format) books#edit
     shal_user_book GET    /users/:user_id/book(.:format)      books#show
                    PATCH  /users/:user_id/book(.:format)      books#update
                    PUT    /users/:user_id/book(.:format)      books#update

リソースフルルーティングにアクションを追加する

  resources :users, only: [:new] do
    # URLヘルパーだけget :foo, on: :memberと書いた場合と異なる
    get :foo
    get :preview, on: :new
    # patch :disable, on: :member でも同じ
    member do
      patch :disable
    end
    # post :bulk_insert, on: :collection でも同じ
    collection do
      post :bulk_insert
    end
  end

           Prefix Verb  URI Pattern                   Controller#Action
         user_foo GET   /users/:user_id/foo(.:format) users#foo
 preview_new_user GET   /users/new/preview(.:format)  users#preview
     disable_user PATCH /users/:id/disable(.:format)  users#disable
bulk_insert_users POST  /users/bulk_insert(.:format)  users#bulk_insert
         new_user GET   /users/new(.:format)          users#new

  resource :book, only: [:new] do
    # member, collectionの区別がないので
    # on: :memberやon: :collectionがあってもなくてもでも同じ結果になる
    get :bar
    get :preview, on: :new
    member do
      patch :disable
    end
    collection do
      post :bulk_insert
    end
  end
  resolve('Book') { [:book] }

          Prefix Verb  URI Pattern                 Controller#Action
        bar_book GET   /book/bar(.:format)         books#bar
preview_new_book GET   /book/new/preview(.:format) books#preview
    disable_book PATCH /book/disable(.:format)     books#disable
bulk_insert_book POST  /book/bulk_insert(.:format) books#bulk_insert
        new_book GET   /book/new(.:format)         books#new

コントローラーを変更する

  # 単にコントローラーをモジュールに入れたいだけなら、
  # scope module: '...'を使うべき
  resources :users, controller: 'admin/accounts'

   Prefix Verb   URI Pattern               Controller#Action
    users GET    /users(.:format)          admin/accounts#index
          POST   /users(.:format)          admin/accounts#create
 new_user GET    /users/new(.:format)      admin/accounts#new
edit_user GET    /users/:id/edit(.:format) admin/accounts#edit
     user GET    /users/:id(.:format)      admin/accounts#show
          PATCH  /users/:id(.:format)      admin/accounts#update
          PUT    /users/:id(.:format)      admin/accounts#update
          DELETE /users/:id(.:format)      admin/accounts#destroy

URLヘルパーの名前を変更する

  # pathやmoduleと異なり、scope as: '...'とは結果が異なるので注意
  resources :users, as: 'accounts'

      Prefix Verb   URI Pattern               Controller#Action
    accounts GET    /users(.:format)          users#index
             POST   /users(.:format)          users#create
 new_account GET    /users/new(.:format)      users#new
edit_account GET    /users/:id/edit(.:format) users#edit
     account GET    /users/:id(.:format)      users#show
             PATCH  /users/:id(.:format)      users#update
             PUT    /users/:id(.:format)      users#update
             DELETE /users/:id(.:format)      users#destroy

newとeditのURIを変更する

  # newとedit以外はURIに出てこないので指定しても効果はない
  resources :users, path_names: { new: 'make', edit: 'change' }

   Prefix Verb   URI Pattern                 Controller#Action
    users GET    /users(.:format)            users#index
          POST   /users(.:format)            users#create
 new_user GET    /users/make(.:format)       users#new
edit_user GET    /users/:id/change(.:format) users#edit
     user GET    /users/:id(.:format)        users#show
          PATCH  /users/:id(.:format)        users#update
          PUT    /users/:id(.:format)        users#update
          DELETE /users/:id(.:format)        users#destroy

リソースフルでないルーティング

リソースフルでないルーティングを追加する

  # method 'パス名', to: 'コントローラー#アクション'
  # のフォーマットで指定する
  # パス名内部の`:id`などはparams[:id]に対応する
  get 'users/:id', to: 'accounts#show'

Prefix Verb URI Pattern          Controller#Action
       GET  /users/:id(.:format) accounts#show

リソースフルでないルーティングにURLヘルパーを追加する

  get 'users/:id', to: 'accounts#show', as: :account

 Prefix Verb URI Pattern          Controller#Action
account GET  /users/:id(.:format) accounts#show

恒久的なリダイレクト

  get 'users/:id', to: 'accounts#show', as: :account
  # 一時的なリダイレクトにしたければ、
  # redirect('users/:id', status: 302)とする
  get 'accounts/:id', to: redirect('users/:id')

 Prefix Verb URI Pattern             Controller#Action
account GET  /users/:id(.:format)    accounts#show
        GET  /accounts/:id(.:format) redirect(301, users/:id)

'/'に対するアクセス時に実行するアクションを指定する

  root 'users#show'
  namespace :admin do
    root 'users#show'
  end

    Prefix Verb URI Pattern      Controller#Action
      root GET  /                users#show
admin_root GET  /admin(.:format) admin/users#show