routes: 動的なパスをscopeでまとめる

ユーザごとのURL配下のコンテンツをgetにべた書きしていたので、scopeでまとめた。

before

get ':username', to: 'pages#index', constraints: { format: /()/ }
get ':username/about', to: 'pages#about', constraints: { format: /()/ }
get ':username/announcements', to: 'pages/announcements#index', constraints: { format: /()/}
get ':username/announcements/:id', to: 'pages/announcements#show', constraints: { format: /()/}

に対して

after

scope ':username', constraints:  { format: /()/ } do
    get '', to: 'pages#index'
    get 'about', to: 'pages#about'
    get 'announcements', to: 'pages/announcements#index'
    get 'announcements/:id', to: 'pages/announcements#show'
  end

こうなる

$ rake routes
                        GET    /:username(.:format)                         pages#index {:format=>/()/}
                  about GET    /:username/about(.:format)                   pages#about {:format=>/()/}
          announcements GET    /:username/announcements(.:format)           pages/announcements#index {:format=>/()/}
                        GET    /:username/announcements/:id(.:format)       pages/announcements#show {:format=>/()/}

すっきり。