The 14th Round of ROR Lab.

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.

30.
ROR Lab.