Présentation de Ruby on Rails faite au Paris JUG le 12/10/2010

1. Ruby On Rails,
vu d’un Javaiste
Paris JUG, 12 octobre 2010
Christian Blavier
cblavier@octo.com

2. Sponsors Platiniums 2010

3. Moi en bref
Architecte chez OCTO
depuis 2004
Expert Java
twi?er.com/cblavier
blog.octo.com/author/cbl/

4. Moi en bref
Architecte chez OCTO
depuis 2004
Expert Java
twi?er.com/cblavier
blog.octo.com/author/cbl/

5. La
promesse
Petit pattern
est
maison
souvent
alléchante
Spring
JSF
RichFaces HTML
hagerstenguy

6. Code applicatif
Couches
d’abstraction
Et la
HTML / JS /CSS
réalité
parfois
écoeurante lifeontheedge

7. « Ruby on Rails is an open-source web framework
that’s optimized for programmer happiness and
sustainable productivity. It let’s write beautiful code
by favoring convention over configuration. »

8. « Ruby on Rails is an open-source web framework
that’s optimized for programmer happiness and
programmer
sustainable productivity. It let’s write beautiful code
by favoring convention over configuration. »

9. Views
Models
Controllers
ActiveRecord
Database

10. Manipulation de dates
Closures

11. Tasty Ruby
Manipulation de dates
Closures

12. > now = DateTime.now
=> Thu, 07 Oct 2010 14:05:43 +0200
> tomorrow = now + 1.day
=> Fri, 08 Oct 2010 14:05:43 +0200
> one_week_ago = 7.days.ago
=> Thu, 30 Sep 2010 14:06:09 +0200

13. Tasty Ruby
Manipulation de dates
Closures

14. > ["one", "two", "three"].map { |word|
word.upcase
}
=> ["ONE", "TWO", "THREE"]
> [1, 2, 3, 4, 5].find_all { |item| item > 3 }
=> [4, 5]

15. Controlleur
Templating
Routing REST
ActiveRecord

16. Un framework fait
pour le web
Controlleur
Templating
Routing REST
ActiveRecord

17. fichier app/controllers/books_controller.rb
class BooksController < ApplicationController
def index
@books = Book.all
end
end

18. fichier app/controllers/books_controller.rb
class BooksController < ApplicationController
def index
@books = Book.all
end
end
class BooksController < ApplicationController
def index
render :json => @books
end
end

19. fichier app/controllers/books_controller.rb
class BooksController < ApplicationController
def index
@books = Book.all
end
end
class BooksController < ApplicationController
def index
render :json => @books
end
end
class BooksController < ApplicationController
def index
render :xml => @books
end
end

20. Un framework fait
pour le web
Controlleur
Templating
Routing REST
ActiveRecord

21. fichier app/views/books/index.html.erb
<h1>Listing Books</h1>
<table>
<tr>
<th>Title</th>
<th>Summary</th>
<th></th>
<th></th>
<th></th>
</tr>
<% @books.each do |book| %>
<tr>
<td><%= book.title %></td>
<td><%= book.content %></td>
<td><%= link_to 'Show', book %></td>
<td><%= link_to 'Edit', edit_book_path(book) %></td>
<td><%= link_to 'Remove', book,:method => :delete %></td>
</tr>
<% end %>
</table>
<%= link_to 'New book', new_book_path %>

22. fichier app/views/books/index.html.haml
%h1 Listing Books
%table
%tr
%th Title
%th Summary
%th
%th
%th
- @books.each do |book|
%tr
%td= book.title
%td= book.content
%td= link_to 'Show', book
%td= link_to 'Edit', edit_book_path(book)
%td= link_to 'Remove', book,:method => :delete
= link_to 'New book', new_book_path

23. fichier app/views/books/index.html.haml
%h1 Listing Books
%table
%tr
%th Title
%th Summary
%th
%th
%th
- @books.each do |book|
%tr
%td= book.title
%td= book.content
%td= link_to 'Show', book
%td= link_to 'Edit', edit_book_path(book)
%td= link_to 'Remove', book,:method => :delete
= link_to 'New book', new_book_path
Haml takes your gross, ugly templates and replaces them with veritable
Haiku. Haml is based on one primary principle : markup should be
beautiful.

24. {markup haiku} {style with attitude}
http://haml-lang.com/ http://sass-lang.com/

25. Un framework fait
pour le web
Controlleur
Templating
Routing REST
ActiveRecord

26. POST /books/create
GET /books/show/1
POST /books/update/1
POST /books/destroy/1

27. POST /books/
GET /books/1
PUT /books/1
DELETE /books/1

28. fichier config/routes.rb
MyApp::Application.routes.draw do |map|
resources :book
end

29. fichier app/controllers/book_controller.rb
class BookController < ApplicationController
# POST /book/1 or POST /book/1.xml
def create
end
# GET /book or GET /book
def show
end
# PUT /book/1 or PUT /book/1.xml
def update
end
# DELETE /book/1 or DELETE /book/1.xml
def destroy
end
end

30. fichier config/routes.rb
MyApp::Application.routes.draw do |map|
resources :people
resources :book
resources :people, :except => :destroy
resources :people do
member do
get 'short_profile'
post 'fire'
end
end
namespace :admin do
resources :people
end
match 'people/:firstname/:lastname' => 'people#show'
end

31. fichier config/routes.rb
MyApp::Application.routes.draw do |map|
resources :people
resources :book
resources :people, :except => :destroy
resources :book, :except => :destroy
resources :people do
member do
get 'short_profile'
post 'fire'
end
end
namespace :admin do
resources :people
end
match 'people/:firstname/:lastname' => 'people#show'
end

32. fichier config/routes.rb
MyApp::Application.routes.draw do |map|
resources :people
resources :book
resources :people, :except => :destroy
resources :book, :except => :destroy
resources :people do
resources do
member :book do
get 'short_profile'
member do
post 'fire'
get 'short_description'
end
end
end
end
namespace :admin do
resources :people
end
match 'people/:firstname/:lastname' => 'people#show'
end

33. fichier config/routes.rb
MyApp::Application.routes.draw do |map|
resources :people
resources :book
resources :people, :except => :destroy
resources :book, :except => :destroy
resources :people do
resources do
member :book do
get 'short_profile'
member do
post 'fire'
get 'short_description'
end
end
end
end
namespace :admin do
namespace :admin do
resources :people
resources :book
end
end
match 'people/:firstname/:lastname' => 'people#show'
end

34. fichier config/routes.rb
MyApp::Application.routes.draw do |map|
resources :people
resources :book
resources :people, :except => :destroy
resources :book, :except => :destroy
resources :people do
resources do
member :book do
get 'short_profile'
member do
post 'fire'
get 'short_description'
end
end
end
end
namespace :admin do
namespace :admin do
resources :people
resources :book
end
end
match 'people/:firstname/:lastname' => 'people#show'
match 'book/:kind/:keyword' => 'book#search'
end

35. Un framework fait
pour le web
Controlleur
Templating
Routing REST
ActiveRecord

37. Run commande shell
rails generate model book title:string description:string
rake db:migrate

38. Run commande shell
rails generate model book title:string description:string
rake db:migrate
You
get fichiers app/model/book.rb
class Book < ActiveRecord::Base
end

39. Run commande shell
rails generate model book title:string description:string
rake db:migrate
You
get fichiers app/model/book.rb
class Book < ActiveRecord::Base
end
You
get fichiers db/schema.rb
ActiveRecord::Schema.define(:version => 20101007134936) do
create_table "books", :force => true do |t|
t.string "title"
t.string "description"
t.datetime "created_at"
t.datetime "updated_at"
end
end

40. Run commande shell
rails generate model book title:string description:string
rake db:migrate
You
get fichiers app/model/book.rb
class Book < ActiveRecord::Base
end
You
get fichiers db/schema.rb
ActiveRecord::Schema.define(:version => 20101007134936) do
create_table "books", :force => true do |t|
t.string "title"
t.string "description"
t.datetime "created_at"
t.datetime "updated_at"
end
end
Run rails console
Book.new(:title => "Fondation", :description => "a fantastic book").save
Book.find_all
Book.find_by_title("Fondation")
Book.where({:title => "Fondation", :description => "a fantastic book"})

41. Testing
Déploiement

42. Un framework fait
pour l’agile
Testing
Déploiement

43. Unit Testing Integration Testing
Functional Testing

44. Unit Testing Integration Testing
test "should
not save book
book = Book.n without title
ew " do
assert !book.
save, "Saved
end book without
title"
Functional Testing

45. Unit Testing Integration Testing
test "should
not save book
book = Book.n without title
ew " do
assert !book.
save, "Saved
end book without
title"
do
t i ndex"
sho uld ge
test "
dex ss
g et :in nse :succe s)
_respo igns (:post
assert il ass
t_n
ass ert_no
end
Functional Testing

46. Unit Testing Integration Testing
class
UserFl
test "should Action owsTes
not save book Contro t <
without title fixtur ller::
book = Book.n " do es :us Integr
ew ers ationT
est
assert !book.
save, "Saved test "
end book without login
title" and br
# logi owse s
n via ite" d
https! https o
get "/
login"
assert
_respo
nse :s
uccess
post_v
login" ia_red
, :use irect
rname "/
users( =>
inde x" do users(
:avs).
userna
o ul d get :avs). me, :p
asswor
st "sh
passwo d =>
te assert rd
dex ss _equal
g et :in onse :succe ts)
assert
_equal
'/welc
ome',
sert _resp signs (:pos flash[
:notic 'Welco path
as as me avs
t_n ot_nil e] !',
asser
https!
(false
end get "/ )
posts/
assert all"
_respo
assert nse :s
assign uccess
end s(:pro
ducts)
end
Functional Testing

47. require 'test/unit'
require 'mocha'
Mocha
require 'fakeweb'
class MiscExampleTest < Test::Unit::TestCase
end
tmcnem

48. require 'test/unit'
require 'mocha'
Mocha
require 'fakeweb'
class MiscExampleTest < Test::Unit::TestCase
def test_with_basic_mocha_stubbing
product = Product.new
product.stubs(:prices).returns([1000, 2000])
assert_equal [1000, 2000], product.prices
end
end
tmcnem

49. require 'test/unit'
require 'mocha'
Mocha
require 'fakeweb'
class MiscExampleTest < Test::Unit::TestCase
def test_with_basic_mocha_stubbing
product = Product.new
product.stubs(:prices).returns([1000, 2000])
assert_equal [1000, 2000], product.prices
end
def test_with_mocha_object_stubbing
prices = [stub(:pence => 1000), stub(:pence => 2000)]
product = Product.new
product.stubs(:prices).returns(prices)
assert_equal [1000, 2000], product.prices.collect {|p| p.pence}
end
end
tmcnem

50. github.com/thoughtbot/factory_girl

51. fichier test/factories.rb
Factory.sequence :email do |n|
"person#{n}@octo.com"
end
Factory.define :user do |u|
u.first_name 'Robert'
u.last_name 'Redford'
u.email { Factory.next(:email) }
end
github.com/thoughtbot/factory_girl

52. fichier test/factories.rb
Factory.sequence :email do |n|
"person#{n}@octo.com"
end
Factory.define :user do |u|
u.first_name 'Robert'
u.last_name 'Redford'
u.email { Factory.next(:email) }
end
fichier test/unit/a_test.rb
u = Factory :user
assert_equal "Robert", user.first_name
assert_equal "Redford", user.last_name
u = Factory :user,:email => "rob@gmail.com"
assert_equal "rob@gmail.com", u.email
github.com/thoughtbot/factory_girl

53. fichier test/factories.rb
Factory.sequence :email do |n|
"person#{n}@octo.com"
end
Factory.define :user do |u|
u.first_name 'Robert'
u.last_name 'Redford'
u.email { Factory.next(:email) }
end
fichier test/unit/a_test.rb
u = Factory :user
assert_equal "Robert", user.first_name
assert_equal "Redford", user.last_name
u = Factory :user,:email => "rob@gmail.com"
assert_equal "rob@gmail.com", u.email
Fixture replacement for
focused and readable tests
github.com/thoughtbot/factory_girl

54. github.com/jtrupiano/timecop

55. freeze_time = Time.now + 200.days
Timecop.freeze(freeze_time) do
assert_equal freeze_time, Time.now
sleep(100)
assert_equal freeze_time, Time.now
end
github.com/jtrupiano/timecop

56. c page
onent t o my publi
itter comp page
dd a tw ugh an o cto public
Feature: A tweet thro
are my
In o rder to sh y page
ymous o cto ee my t witts on m
As an anon tter acc ount and s
set my twi
I want to
count
Set my twitter ac
Scenario: avier
me is Ch ristian Bl
G iven my na
ebook
on octofac dy exist
And I am e, cblav ier, alrea
And my public pag eet"
ed "Her e is my tw
And I have twitt
page
hen I go to edit my t" with "c
blavier"
W accoun
i n "twitter
And I fill de Christi
an"
I press "U
pdate" publique
And enue su r la page
uld see "Bienv
Then I sho Here is my
tweet"
ld see "
And I shou

57. Un framework fait
pour l’agile
Testing
Déploiement

59. AfterTheWeekend
Rassembler, Enrichir, Imprimer vos photos d’évènements
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