Routes Controllers

Routes Controllers

• 1.
  ROUTES AND CONTROLLERS
• 2.
  ROUTES • Abstract literalURLs from code • The mapping between URLs and code, serves two purposes: • Recognize URLs and trigger a controller action • Generate URLs from names or objects, so you don’t have to hard code them in views
• 3.
  REST • Representational StateTransfer (REST) • Architecture Pattern • Supports Distributed Hypermedia such as the World Wide Web • Roy Fielding, 2000
• 4.
  CLIENT - SERVER
• 5.
  STATELESS
• 6.
  CACHE
• 7.
  UNIFORM INTERFACE
• 8.
  REST • client-server • stateless communication • uniform interface between components • separation of concerns between UI and data storage
• 9.
  RAILS REST HELPERS inroutes.rb resources :people $ rake routes people GET /people(.:format) {:action=>"index", :controller=>"people"} people POST /people(.:format) {:action=>"create", :controller=>"people"} new_person GET /people/new(.:format) {:action=>"new", :controller=>"people"} edit_person GET /people/:id/edit(.:format) {:action=>"edit", :controller=>"people"} person GET /people/:id(.:format) {:action=>"show", :controller=>"people"} person PUT /people/:id(.:format) {:action=>"update", :controller=>"people"} person DELETE /people/:id(.:format) {:action=>"destroy", :controller=>"people"}
• 10.
  DEFAULT REST Index The indexaction  provides a list of all the resources of a specific type Sample URL: http://localhost:3000/people HTTP GET Defualt web page: index.html Show The show action displays the details of a specific resources, by default identified by its ID Sample URL: http://localhost:3000/people/42 HTTP GET Defualt web page: show.html
• 11.
  DEFAULT REST New The newaction displays the a form for creating a new object Sample URL: http://localhost:3000/people/new HTTP GET Defualt web page: new.html Create The create action accepts the form fields as parametrs to create a new model Sample URL: http://localhost:3000/people HTTP POST no corresponding web page (re-directs to show.html to display the newly created object)
• 12.
  DEFAULT REST Edit The editaction displays the a form for modifying a specific object Sample URL: http://localhost:3000/people/42/edit HTTP GET Defualt web page: edit.html Update The update action accepts form fields as parametrs to modify the attributes of a model Sample URL: http://localhost:3000/people/42 HTTP PUT no corresponding web page (re-directs to show.html to display the modified object)
• 13.
  DEFAULT REST Delete The deleteaction destroys a specific model Sample URL: http://localhost:3000/people/42 HTTP DELETE