13.10.2014

1. be happy with
ruby on rails

2. lucas renan

5. guru
sorocaba

6. wanna be a
developer?

8. yukihiro
matsumoto

9. programming language
ruby

10. david
heinemeier
hansson

11. web framework
ruby on rails

12. $ rails new my_app

13. Gemfile
source 'https://rubygems.org'
!
# Bundle edge Rails instead: gem 'rails', github:
'rails/rails'
gem 'rails', '4.1.6'
# Use sqlite3 as the database for Active Record
gem 'sqlite3'
# Use SCSS for stylesheets
gem 'sass-rails', '~> 4.0.3'
# Use Uglifier as compressor for JavaScript assets
gem 'uglifier', '>= 1.3.0'
# Use CoffeeScript for .js.coffee assets and views
gem 'coffee-rails', '~> 4.0.0’

14. modularity

15. config/application.rb
# Pick the frameworks you want:
!
require "active_model/railtie"
require "active_record/railtie"
require "action_controller/railtie"
# require "action_mailer/railtie"
require "action_view/railtie"
require "sprockets/railtie"
require "rails/test_unit/railtie"

16. environments

17. config/database.yml
development:
adapter: sqlite3
database: db/development.sqlite3
!
test:
adapter: sqlite3
database: db/test.sqlite3
!
production:
adapter: sqlite3
database: db/production.sqlite3

18. $ rails g scaffold post title content:text

19. migrations

20. db/migrate/20141013174127_create_posts.rb
class CreatePosts < ActiveRecord::Migration
def change
create_table :posts do |t|
t.string :title
t.text :content
!
t.timestamps
end
end
end

21. $ rake db:migrate

22. models

23. app/models/post.rb
class Post < ActiveRecord::Base
end

24. $ rails c
post = Post.new(title: "I love ruby")
post.save
#INSERT INTO "posts" (“title”)
VALUES (?) [["title", "I love ruby”]]

25. $ rails c
Post.all
#SELECT "posts".* FROM "posts"
!
Post.find 1
# SELECT "posts".* FROM "posts" WHERE
"posts"."id" = ? LIMIT 1 [["id", 1]]

26. routes

27. $ rake routes
Prefix Verb URI Pattern Controller#Action
!
posts GET /posts(.:format) posts#index
POST /posts(.:format) posts#create
new_post GET /posts/new(.:format) posts#new
edit_post GET /posts/:id/edit(.:format) posts#edit
post GET /posts/:id(.:format) posts#show
PATCH /posts/:id(.:format) posts#update
PUT /posts/:id(.:format) posts#update
DELETE /posts/:id(.:format) posts#destroy

28. controllers

29. app/controllers/posts_controllers.rb
class PostsController < ApplicationController
!
# GET /posts
# GET /posts.json
def index
@posts = Post.all
end

30. views

31. app/views/posts/index.html.erb
<% @posts.each do |post| %>
!
<%= post.title %>
!
<%= link_to 'Show', post %>
<%= link_to 'Edit', edit_post_path(post) %>
<%= link_to 'Destroy', post, method: :delete,
data: { confirm: 'Are you sure?' } %>
!
<% end %>

32. app/views/posts/_form.html.erb
<%= form_for(@post) do |f| %>
!
<%= f.label :title %>
<%= f.text_field :title %>
!
<%= f.submit %>
!
<% end %>

33. app/controllers/posts_controllers.rb
class PostsController < ApplicationController
!
# POST /posts
def create
@post = Post.new(post_params)
!
respond_to do |format|
if @post.save
format.html { redirect_to @post, notice: 'Post
was successfully created.' }
else
format.html { render :new }
end
end
end

34. asset pipeline

35. app/stylesheets/application.css
/*
*= require_tree .
*= require_self
*/

36. app/javascripts/application.js
//= require jquery
//= require jquery_ujs
//= require_tree .

37. app/
helpers/!
mailers/!
services/!
uploaders/!
presenters/!
whatever/

38. tests

39. test/controllers/posts_controller_test.rb
class PostsControllerTest < ActionController::TestCase
setup do
@post = posts(:one)
end
!
test "should get index" do
get :index
assert_response :success
assert_not_nil assigns(:posts)
end

40. test/controllers/posts_controller_test.rb
class PostsControllerTest < ActionController::TestCase
setup do
@post = posts(:one)
end
!
test "should create post" do
assert_difference('Post.count') do
post :create, post: { title: @post.title }
end
!
assert_redirected_to post_path(assigns(:post))
end

41. show me in action!

42. thanks :)