The document discusses customizing resourceful routes in Rails routing. Some key points covered include setting the controller, path names, namespaces, constraints, HTTP verbs, and scoping routes. Customizing resourceful routes allows mapping RESTful routes to different controllers, paths, and more to suit various needs.

1. The 14th Round of ROR Lab.
Rails Routing
from the Outside In
(2)
June 9th, 2012
Hyoseong Choi
ROR Lab.

2. Non-Resourceful
default Rails route :
match ':controller(/:action(/:id))'
symbols bound to parameters
special symbols:
:controller and :action
ROR Lab.

3. Dynamic Segments
match ':controller/:action/:id/:user_id'
params[:id]
params[:user_id]
When you need namespacing controllers,
match ':controller(/:action(/:id))', :controller => /admin/[^/]+/
ROR Lab.

4. Static Segments
match ':controller/:action/:id/with_user/:user_id'
ROR Lab.

5. Query String
/photos/show/1?user_id=2
params[:controller] = “photos”
params[:action] = “show”
params[:id] = 1
params[:user_id] = 2
ROR Lab.

6. Defining Defaults
match 'photos/:id' => 'photos#show'
match 'photos/:id' => 'photos#show',
ROR Lab.

7. Naming Routes
match 'exit' => 'sessions#destroy', :as => :logout
logout_path, logout_url
ROR Lab.

8. HTTP Verb
match 'photos/show' => 'photos#show', :via => :get
get 'photos/show'
match 'photos/show' => 'photos#show',
:via => [:get, :post]
ROR Lab.

9. Segment
Constraints
match 'photos/:id' => 'photos#show',
match 'photos/:id' => 'photos#show',
X match '/:id' => 'posts#show',
match '/:id' => 'posts#show',
:constraints => { :id => /d.+/ }
match '/:username' => 'users#show'
ROR Lab.

10. Request-based
any method on the Request object that returns aString.
match "photos",
:constraints => {:subdomain => "admin"}
namespace :admin do
constraints :subdomain => "admin" do
resources :photos
end
http://api.rubyonrails.org/classes/ActionDispatch/Http/URL.html
ROR Lab.

11. Request object attributes
ROR Lab.

12. Advanced
Constraints
class BlacklistConstraint
def initialize
@ips = Blacklist.retrieve_ips
end
def matches?(request)
@ips.include?(request.remote_ip)
end
end
TwitterClone::Application.routes.draw do
match "*path" => "blacklist#index",
:constraints => BlacklistConstraint.new
ROR Lab.

13. Route Globbing
: pattern matching using wildcard segments
match 'photos/*other' => 'photos#unknown'
• photos/12
• /photos/long/path/to/12
• params[:other] = “12”
• params[:other] = “long/path/to/12”
ROR Lab.

14. Route Globbing
: anywhere in a route
match 'books/*section/:title' => 'books#show'
• books/some/section/last-words-a-memoir
• params[:section] = “some/section”
• params[:title] = “last-words-a-memoir”
ROR Lab.

15. Route Globbing
: even more than one wildcard segments
match '*a/foo/*b' => 'test#index'
• zoo/woo/foo/bar/baz
• params[:a] = “zoo/woo”
• params[:b] = “bar/baz”
ROR Lab.

16. Route Globbing
: always match the optional format segment
by defaults from Rails 3.1
3.1~ match '*pages' => 'pages#show'
3.0.x match '*pages' => 'pages#show', :format => false
match '*pages' => 'pages#show', :format => true
• /foo/bar.json
• params[:pages] = “foo/bar”
• request format => JSON
ROR Lab.

17. Redirection
using a 301 ‘moved permanently’ redirect
match "/stories" => redirect("/posts")
match "/stories/:name" => redirect("/posts/%{name}")
match "/stories/:name" => redirect {|params| "/posts/
#{params[:name].pluralize}" }
match "/stories" => redirect {|p, req| "/posts/#{req.subdomain}" }
provide the leading host (http://www.example.com)
ROR Lab.

18. Routing to Rack
Applications
match "/application.js" => Sprockets
ROR Lab.

19. Using root
“/”
root :to => 'pages#main'
ROR Lab.

20. Customizing
Resourceful Routes
resources :photos, :controller => "images"
resources :photos, :constraints => {:id => /[A-Z][A-Z][0-9]+/}
or
constraints(:id => /[A-Z][A-Z][0-9]+/) do
resources :photos
resources :accounts
end
resources :photos, :as => "images"
ROR Lab.

21. Customizing
Resourceful Routes
resources :photos, :controller => "images"
ROR Lab.

22. Customizing
Resourceful Routes
resources :photos, :as => "images"
ROR Lab.

23. Customizing
Resourceful Routes
resources :photos, :path_names => { :new => 'make', :edit => 'change' }
/photos/make
/photos/1/change
scope :path_names => { :new => "make" } do
# rest of your routes
end
ROR Lab.

24. Customizing
Resourceful Routes
scope "admin" do
resources :photos, :as => "admin_photos"
end
resources :photos
admin_photos_path, new_admin_photo_path
scope "admin", :as => "admin" do
resources :photos, :accounts
end
admin_photos_path and admin_accounts_path
resources :photos, :accounts
/admin/photos and /admin/accounts
ROR Lab.

25. Customizing
Resourceful Routes
scope ":username" do
resources :posts /bob/posts/1
params[:username]
ROR Lab.

26. Customizing
Resourceful Routes
resources :photos, :only => [:index, :show]
resources :photos, :except => :destroy
ROR Lab.

27. Customizing
Resourceful Routes
scope(:path_names => { :new => "neu", :edit => "bearbeiten" }) do
resources :categories, :path => "kategorien"
end
ROR Lab.

28. Customizing
Resourceful Routes
resources :magazines do
resources :ads, :as => 'periodical_ads'
end
magazine_periodical_ads_url
edit_magazine_periodical_ad_path
ROR Lab.

29. 감사합니다.