Sinatra - Primeiros Passos

Sinatra
Primeiros passos

por Jésus Lopes
#zigottolabs @jtadeulopes

sexta-feira, 11 de fevereiro de 2011

#zigottolabs

ruby


web

ruby


framework
web

ruby


framework
web

ruby

development


framework
web

ruby
applications
development


framework
web

ruby
applications
development

open-source

e o Rails?


Ele é o mais utilizado,
mas não é o único!


Sinatra

“Sinatra is a DSL for quickly creating
web applications in Ruby with minimal effort”

https://github.com/sinatra/sinatra

O que eu preciso?


O que eu preciso?

$ gem install sinatra


O que eu preciso?

$ gem install sinatra

pronto =)


Primeiro exemplo


Primeiro exemplo

Mínimo de
esforço, ok?


1 # my_app.rb
2 require "rubygems"
3 require "sinatra"
4
5
6 get "/" do
7 "#zigottolabs"
8 end


$ ruby my_app.rb


Routes
http://sinatra-book.gittr.com/#routes


1 # simple routes
2
3 get "/contact" do
4 "http://www.zigotto.com"
5 end
6
7 # named parameters
8
9 get "/url/:username" do
10 # GET /url/jtadeulopes
11 params[:username] # => "jtadeulopes"
12 end


HTTP Methods
http://sinatra-book.gittr.com/#http_methods


1 get "/" do
2 "show..."
3 end
4
5 post "/" do
6 "create something..."
7 end
8
9 put "/" do
10 "update something..."
11 end
12
13 delete "/" do
14 "delete..."
15 end


Views
http://sinatra-book.gittr.com/#views


1 get "/" do
2 '<html>
3 <head>
4 <title>Sinatra</title>
5 </head>
6 <body>
7 <p>Primeiros passos com sinatra</p>
8 </body>
9 </html>'
10 end


Mínimo esforço?


1 # erb
2 get "/" do
3 erb :index
4 end


1 # erb
2 get "/" do
3 erb :index
4 end

1 
2 <html>
3 <head>
4 <title>Sinatra</title>
5 </head>
6 <body>
7 <p>Primeiros passos com sinatra</p>
8 </body>
9 </html>

1 # haml
2 # render /views/index.haml
3
4 get "/" do
5 haml :index
6 end
7
8 # sass
9 # render /views/stylesheet.sass
10
11 get "/stylesheet.css" do
12 content_type "text/css", :charset => "utf-8"
13 sass :stylesheet
14 end


Helpers
http://sinatra-book.gittr.com/#helpers


1 helpers do
2
3 def profile_url(username)
4 "http://twitter.com/#{username}"
5 end
6
7 end
8
9 get "/url/:username" do
10 # GET /url/jtadeulopes
11 profile_url(params[:username])
12 end


Filters
http://sinatra-book.gittr.com/#ﬁlters


1 before do
2 "this code will run before each request..."
3 end
4
5 get "/" do
6 "...."
7 end
8
9 after do
10 "this code will run after each request..."
11 end


Conﬁguration
http://sinatra-book.gittr.com/#conﬁguration


1 # all environments
2 configure do
3 "..."
4 end
5
6 # production
7 configure :production do
8 set :domain, "http://www.site.com"
9 not_found do
10 erb :"404"
11 end
12 error do
13 erb :"500"
14 end
15 end
16
17 # multiple
18 configure :development, :test do
19 set :domain, "http://localhost:4567"
20 end
21
22 # GET /
23 get "/" do
24 "my domain is #{options.domain}"
25 end


Models
http://sinatra-book.gittr.com/#models


ActiveRecord

$ gem install activerecord


1 # my_app.rb
2 require "rubygems"
3 require "sinatra"
4 require "active_record"
5
6 # connection settings
7 ActiveRecord::Base.establish_connection(
8 :adapter => 'mysql2',
9 :host => "localhost",
10 :username => "my_user",
11 :password => "my_password",
12 :database => "app_development"
13 )
14
15 # you already have a 'vehicles' table in your database
16 class Vehicle < ActiveRecord::Base
17 end
18
19 get "/" do
20 @vehicles = Vehicle.all
21 erb :index
22 end


Testing
http://www.sinatrarb.com/testing.html


Test::Unit
1 # my_app_test.rb
2 require './my_app' $ gem install rack-test
3 require 'test/unit'
4 require 'rack/test'
5
6 class MyAppTest < Test::Unit::TestCase
7 include Rack::Test::Methods
8
9 def app
10 Sinatra::Application
11 end
12
13 def test_my_contact
14 get '/contact'
15 assert_equal 'http://www.zigotto.com', last_response.body
16 end
17
18 def test_with_params
19 get '/url/jtadeulopes'
20 assert_equal 'http://twitter.com/jtadeulopes', last_response.body
21 end
22
23 end


1
2
# my_app_spec.rb
require './my_app' Rspec
3 require 'rack/test'
$ gem install rspec
4 require 'rspec'
5
6 set :environment, :test
7
8 describe 'MyApp' do
9 include Rack::Test::Methods
10
11 def app
12 Sinatra::Application
13 end
14
15 it "should return url of contact" do
16 get '/contact'
17 last_response.should be_ok
18 last_response.body.should == "http://www.zigotto.com"
19 end
20
21 it "should return twitter url" do
22 get "/url/jtadeulopes"
23 last_response.should be_ok
24 last_response.body.should == "http://twitter.com/jtadeulopes"
25 end
26
27 end


Live coding!


Obrigado!


Links
• http://www.sinatrarb.com

• https://github.com/sinatra/sinatra

• http://adam.blog.heroku.com/

• http://sinatra-book.gittr.com

• http://www.sinatrarb.com

• http://www.slideshare.net/cpjolicoeur/sinatra-ruby-framework-presentation

• http://railsforkids.com/


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