Rails to Sinatra

What's ready

Jiang Wu

Is Mr. Tsuyoshikawa

Here?吉川さんは着たの

か。1/51

『Sinatra 1.0 の世界にようこそ』

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Minimal Effort最小限の労力

require 'rubygems'require 'sinatra'

get '/' do "Hello, world!"end

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It's unfair不公平

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over one

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The answer is friends「友達」がカギ

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Sinatra is designed to need friends

Sinatraは友達を前提に設計されている

No Presets設定不要

Pure RubyピュアRuby

Rack-loverRack好き 7/51

Fight with our friends!友と闘え！

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Rack is the best friendRackは最高の友達

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Middlewares in SinatraSinatraでのミドルウェア

Rack::Session::Cookie

Rack::CommonLogger

Rack::MethodOverride

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rack-contrib

Rack::Profiler

Rack::JSON-P

Rack::Recaptcha

Rack::MailExceptions

(and more)11/51

Rack::Cache

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Rack::URLMap

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Seperate apps by pathパスでアプリを分割

# in config.rumap '/blogs' do run App::SimpleBlogend

map '/us' do run App::UrlShortenerend

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Seperate apps by hostホスト名でアプリを分割

# in config.rumap 'http://blogs.mysite.com/' do run App::SimpleBlogend

map 'http://us.mysite.com/' do run App::UrlShortenerend

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Directory Structure(1)ディレクトリ構成(1)

- multi/ - apps/ | simple_blog_app.rb | url_shortener_app.rb - views/ + simple_blog/ + url_shortener/ | config.ru

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Directory Structure(2)ディレクトリ構成(2)

- multi/ - simple_blog/ | app.rb | config.ru + views/ - url_shortener/ | app.rb | config.ru + views/ | config.ru

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Rack is awesome!

Rack最高!18/51

Some common tasks基本タスク

CRUD

Unit Test

Authentication

Ajax

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CRUD exampleCRUDの例

Need these friends:必須の友

shotgun

haml

sequel

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migrationマイグレーション

# in 1281789589_create_blogs.rb# touch `date +%s`_create_blogs.rbSequel.migration do up do create_table(:blogs) do primary_key :id end endend

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run migrationマイグレーションの実行

sequel -m migrations -E $DATABASE_URL

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rollbackロールバック

# "-M 0" means to rollback all# "-M 0" は全部をロールバックという意味

sequel -m migrations -M 0 -E $DATABASE_URL

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app.rb

require 'rubygems'require 'sinatra'require 'blog'

get '/blogs/:id' do |id| @blog = Blog[:id => id] haml :articleend

post '/blogs/?' do @blog = Blog.create(params[:blog]) redirect "/#{@blog.id}"end

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config.ru

require 'app'require 'sequel'

DB = Sequel.connect ENV['DATABASE_URL']

class Blog < Sequel::Modelend

run Sinatra::Application

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run config.ruconfig.ruの実行

~/workspace/sinatra$ shotgun -s thin

== Shotgun/Thin on http://127.0.0.1:9393/>> Thin web server (v1.2.7 codename No Hup)>> Maximum connections set to 1024>> Listening on 127.0.0.1:9393, CTRL+C to stop

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Unit Test

Need these friends:必須の友

Rack::MockRequest

Rspec | Test::Unit | Shoulda

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Rack::MockRequest

# Mock of a Rack App# Rack アプリケーションをモックするreq = Rack::MockRequest.new(Sinatra::Application)

# invoke HTTP methods(as in Sinatra)# HTTPメソッドを呼び出す(Sinatraと同じ)resp = req.get('/')

# And you get one Rack::MockResponse# Rack::MockResponseを得るresp.should.be.kind_of Rack::MockResponse

resp.should.be.okresp.body.should.match(%r{ <title>My Title</title> })

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Authentication認証

Need these friends:必須の友

Warden

Rack::OpenID

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Strategies認証方式

No presetted strategies.あらかじめセットされた認証方式はない

Adding new strategy is very easy.新しい方式を加えるが容易だ

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Add new Strategy

# Add to strategies // 認証方式を加えるWarden::Strategies.add(:password) do

def authenticate! u = User.auth(params['username'], params['password']) u.nil? ? fail!("Could not log in") : success!(u) endend

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Use Warden

# must enable session when use warden# セッションの使用が必須enable :session

# just as use a rack middleware# Rackミドルワェアの使用と同じuse Warden::Manager do |manager|

# assign the stategies # 認証方式を指定する manager.default_strategies :password

# Which Rack App to handle failure? # 失敗したらどのRack Appをとうして処理するか manager.failure_app = Failedend

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OpenID and OAuth

warden-openid provides

warden-oauth provides

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Ajax

Need these friends:必須の友

jQuery

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Client-side code

$.post('/blogs', { title: 'new title', content: '.. some content' });

// with jquery-form$('#form').ajaxSubmit();

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No respond_to

# in a rails controller# different routes "/:id.:format", "/:id?format=:format"# shares the same code# パスが異なっていても同じコードを共有している

def show respond_to do |format| format.json do # deal with json end format.html do # deal with html end endend

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Only case ... when ...

# use regexp routes# 正規表現のルーツを使う

get %r{^/blogs/:id(\.json|\.xml)?$} do if params[:captures] params[:format] = params[:captures][0][1..-1] end

case params[:format] when 'json' # deal with json else # deal with html endend

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Web services may help便利なサービス

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Heroku

Minimal effort to deploy app

最小限の労力でアプリをデプロする

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just a "push""push"するだけ

wujiang@wujiang-laptop:~/jiangwu.net$ git push heroku masterCounting objects: 7, done.Delta compression using up to 2 threads.Compressing objects: 100% (4/4), done.Writing objects: 100% (4/4), 1.03 KiB, done.Total 4 (delta 2), reused 0 (delta 0)

-----> Heroku receiving push-----> Rack app detected Compiled slug size is 340K-----> Launching...... done http://www.jiangwu.net deployed to Heroku

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no need to setup system by yourselfセットアップ不要

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Disqus

Minimal effort of comment system

最小限の労力でコメントシステムを作る

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add commenting system in one minute

瞬時にコメント機能を追加

<section class="comments"> ... <script type="text/javascript" src="http://disqus.com/forums/wujiang/embed.js"> </script> ...</section>

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Loading読み込み中

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Loading Complete読み込み完了

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Light but powerful軽くてパワフル

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Focus専念

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Real Business真の用事

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Make friends actively友達をたくさん作ろう!

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Questions?質問どうぞ

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Thank you!

Especially thanks Masayoki TakaHashi and Eito Katagiri for translations!

http://jiangwu.net

@mastewujiang

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