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

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01 RUBY/RAILS BOOKS

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

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and many more..

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02 REBUILDING RAILS

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NOAH GIBBS

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

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RAILS INTERNALS CAN TEACH YOU A LOT…

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NOT JUST READING - ALSO LOTS OF CODING

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BUILD YOUR OWN GEM bundler new my_framework

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PUBLISH YOUR FIRST GEM push it to rubygems.org

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LEARN HOW RACK WORKS what is Rack?

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Browser App Server RACK Ruby App

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

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

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run object.call

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

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

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env argument

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{ "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" }

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

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

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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

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BUILD YOUR OWN ROUTER

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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

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BUILD YOUR OWN CONTROLLERS

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

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HOW TO LOAD CONTROLLERS?

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HOW TO LOAD RAILS CONTROLLERS? Rails magic autoloading

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require ‘users_controller’

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$LOAD_PATH

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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" ]

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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

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method_missing?

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const_missing?

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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

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Learn how redirects work (30× status)

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

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Learn how cookies work

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

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

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Build your own small ORM

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03 BENEFITS

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REINVENTING THE WHEEL

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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