Putting CRUD to REST: An Introduction to RESTful Routing by Dan Berger

Transcript

1. Putting CRUD to REST
2. Goals - Briefly introduce you to Representational State Transfer, or REST. - Give you a mental model for relating RESTful controller actions to CRUD principles.
3. Quick CRUD review - Create - Read - Update - Delete
4. Read: Index & Show actions - Index reads all the instances of this object. - @foos = Foo.all - Show reads one instance of this object. - @foo = Foo.find(params[:id]) - They are both HTML ‘get’ actions.
5. CRUD REST HTML Create Read index get show get Update Delete
6. Create: New controller action - HTML ‘get’ request from browser - Controller creates an empty object: - @foo = Foo.new - Controller sends “new” view to browser.
7. Create: Create controller action - HTML ‘post’ request from browser - Controller creates an object with attributes: - @foo = Foo.new(params) - Controller saves the new object: - @foo.save
8. Create: full circle NEW ‘get’ the view and empty object Controller CREATE ‘post’ the form params to the object and save
9. CRUD REST HTML Create new get create post Read index get show get Update Delete
10. Update: Edit controller action - HTML ‘get’ request from browser - Controller finds the target object in DB: - @foo = Foo.find(params[:id]) - Controller sends “edit” view to browser with complete params.
11. Update: Update controller action - HTML ‘put’ request from browser - Controller updates the object’s attributes: - @foo = Foo.update(params) - Controller saves the object: - @foo.save
12. Update: full circle EDIT ‘get’ the view and object attributes Controller UPDATE ‘put’ the form params to the object and save
13. CRUD REST HTML Create new get create post Read index get show get Update edit get update put Delete
14. Delete: Destroy controller action - HTML ‘destroy’ request from browser - actually a ‘get’ request with { method: delete } options hash - Controller finds the target object in DB: - @foo = Foo.find(params[:id]) - DESTROY!!!! - @foo.destroy
15. CRUD REST HTML Create new get create post Read index get show get Update edit get update put Delete destroy destroy*
16. CRUD REST HTML Create new get create post Read index get show get Update edit get update put Delete destroy destroy*