The best Rails book you’ve never read. DAMIR SVRTAN

01 RUBY/RAILS BOOKS

WELL KNOWN BOOKS POODR Sandi Metz RoR Tutorial Michael Hartl Pickaxe David Thomas Metaprogramming Ruby Paolo Perrotta

and many more..

02 REBUILDING RAILS

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NOAH GIBBS

Get your hands dirty and build your own Ruby Web Framework - NOAH GIBBS

RAILS INTERNALS CAN TEACH YOU A LOT…

NOT JUST READING - ALSO LOTS OF CODING

BUILD YOUR OWN GEM bundler new my_framework

PUBLISH YOUR FIRST GEM push it to rubygems.org

LEARN HOW RACK WORKS what is Rack?

Browser App Server RACK Ruby App

ALMOST EVERY RUBY FRAMEWORK USES IT! Rails, Sinatra, Hanami, Roda..

# config.ru require 'rack' class MyApp def call(env) [200, { 'Content-Type' => 'text/html' }, ["Hello World"]] end end run MyApp.new

run object.call

run proc { |env| [200, { 'Content-Type' => 'text/html' }, [Time.now] }

# config.ru require 'rack' class MyApp def call(env) [200, { 'Content-Type' => 'text/html' }, ["Hello World"]] end end run MyApp.new

env argument

{ "SERVER_SOFTWARE"=>"THIN 1.6.3 CODENAME PROTEIN POWDER", "SERVER_NAME"=>"LOCALHOST", "RACK.INPUT"=>#, "RACK.VERSION"=>[1, 0], "RACK.ERRORS"=>#FALSE, "RACK.MULTIPROCESS"=>FALSE, "RACK.RUN_ONCE"=>FALSE, "REQUEST_METHOD"=>"GET", "REQUEST_PATH"=>"/", "PATH_INFO"=>"/", "REQUEST_URI"=>"/", "HTTP_VERSION"=>"HTTP/1.1", "HTTP_HOST"=>"LOCALHOST:3000", "HTTP_CONNECTION"=>"KEEP-ALIVE", "HTTP_CACHE_CONTROL"=>"MAX-AGE=0", "HTTP_UPGRADE_INSECURE_REQUESTS"=>"1", "HTTP_USER_AGENT"=>"MOZILLA/5.0 (MACINTOSH; INTEL MAC OS X 10_11_3) APPLEWEBKIT/537.36 (KH™L, LIKE GECKO) CHROME/51.0.2704.103 SAFARI/537.36", "HTTP_ACCEPT"=>"TEXT/H™L,APPLICATION/XH™L+XML,APPLICATION/XML;Q=0.9,IMAGE/WEBP,*/*;Q=0.8", "HTTP_ACCEPT_ENCODING"=>"GZIP, DEFLATE, SDCH", "HTTP_ACCEPT_LANGUAGE"=>"EN-US,EN;Q=0.8", "HTTP_COOKIE"=> "", "GATEWAY_INTERFACE"=>"CGI/1.2", "SERVER_PORT"=>"3000", "QUERY_STRING"=>"", "SERVER_PROTOCOL"=>"HTTP/1.1", "RACK.URL_SCHEME"=>"HTTP", "SCRIPT_NAME"=>"", "REMOTE_ADDR"=>"127.0.0.1" }

# config.ru require 'rack' class MyApp def call(env) [200, { 'Content-Type' => 'text/html' }, ["Hello World"]] end end run MyApp.new

[200, { 'Content-Type' => 'text/html' }, ["Hello World”]]

use Rack::Session::Cookie, :secret => 'abc123' use BetterErrors::Middleware if Noodles.env.development? use Rack::CommonLogger, $stdout use Rack::ContentType use Rack::MethodOverride use Rack::Static, urls: ["/css", "/images", "/js", "/favicon.ico"], root: "public" run Noodles.application

BUILD YOUR OWN ROUTER

Noodles.http_app.routes do root_to 'home#index' get 'chat', 'chat#index' get "auth/:provider/callback", 'session#success' get "auth/failure", 'session#failure' post "rooms", "rooms#create" delete "logout", 'session#logout' resources :users end

BUILD YOUR OWN CONTROLLERS

class RoomsController < BaseController def create room = Room.new(name: params['name'], public: true) room.save! redirect_to ‘/' end end

HOW TO LOAD CONTROLLERS?

HOW TO LOAD RAILS CONTROLLERS? Rails magic autoloading

require ‘users_controller’

$LOAD_PATH

puts $LOAD_PATH [ "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/eventmachine-1.0.7/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/daemons-1.1.9/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/thin-1.6.3/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/rack-1.6.4/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/slop-3.6.0/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/method_source-0.8.2/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/pry-0.10.3/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/coderay-1.1.1/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/pry-byebug-3.3.0/lib", "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/byebug-8.2.4/lib" ]

puts $LOAD_PATH [ "/Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib" ] ls /Users/damirsvrtan/.rbenv/versions/2.3.1/lib/ruby/gems/2.3.0/gems/did_you_mean-1.0.0/lib/did_you_mean core_ext formatter.rb spell_checkable.rb version.rb extra_features jaro_winkler.rb spell_checkers extra_features.rb levenshtein.rb verbose_formatter.rb require 'did_you_mean/extra_features'

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controllers_folder_path = File.join("app", "controllers") $LOAD_PATH << controllers_folder_path

method_missing?

const_missing?

class Object def self.const_missing(constant) require Noodles.to_underscore(constant.to_s) Object.const_get(constant) end end Admin::UsersController -> admin/users_controller

Learn how redirects work (30× status)

Learn how render and ERB work (use haml, slim, tilt)

Learn how cookies work

class UsersController < ApplicationController def index cookies[:favorite_color] ||= :black end end

class UsersController < ApplicationController def index unless request.cookies[:favorite_color] == :black response.headers.push('Set-Cookie', 'favorite_color=black') end end end

Build your own small ORM

03 BENEFITS

REINVENTING THE WHEEL

BETTER GRASP ON RAILS, RACK, GEMS & THE HTTP LAYER

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Any questions? [email protected] @DAMIRSVRTAN Visit infinum.co or find us on social networks: infinum.co infinumco infinumco infinum