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Ruby on Rails introduction
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joren
November 27, 2013
Programming
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Ruby on Rails introduction
A short walk through Ruby and Rails/
joren
November 27, 2013
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Transcript
Ruby (on Rails) PHPBenelux @ Nucleus
• @joren • Openminds • ArrrrCamp
Ruby
History
History • 1995 • Yukihiro Matsumoto (aka Matz) • Philosophy:
Designed for programmer productivity and fun.
History • Inspired by Perl, Smalltalk, Lisp, Python • “I
wanted a scripting language that was more powerful than Perl, and more object-oriented than Python. That's why I decided to design my own language.”
Syntax
Dynamic typing
Strong typing
Duck typing • it walks like a duck; • it
talks like a duck; • it will probably be a duck.
Objects
Objects • Everything is an object • Defined by its
BEHAVIOUR
Objects Even primitive types
Classes - Modules • can be instantiated • object creation
• can inherit • cannot be included • can *not* be instantiated • mixin facility, namespace • no inheritance • can be included in classes and modules
Classes - Modules
Dynamic re-open everything
Dynamic
Dynamic
Variables
Methods
Methods
Strings & numbers
Arrays
Hashes
Loops
Conditions
Stdlib abbrev base64 benchmark bigdecimal cgi cmath coverage csv curses
date dbm debug delegate digest dl drb e2mmap English erb etc extmk fcntl fiddle fileutils find forwardable gdbm getoptlong gserver iconv io/console io/nonblock io/wait ipaddr irb json logger mathn matrix minitest minitest/benchmark minitest/spec mkmf monitor mutex_m net/ftp net/ http net/imap net/pop net/smtp net/telnet nkf objspace observer open- uri open3 openssl optparse ostruct pathname pp prettyprint prime profile profiler pstore psych pty racc racc/parser rake rdoc readline resolv resolv-replace rexml rinda ripper rss rubygems scanf sdbm securerandom set shell shellwords singleton socket stringio strscan sync syslog tempfile test/unit thread thwait time timeout tk tmpdir tracer tsort un uri weakref webrick win32ole xmlrpc yaml zlib
Gems • + 65.000 gems • little code libraries/modules •
gem install twitter
Rails just another gem
History • 37 Signals (Basecamp) • David Heinemeier Hansson (aka
DHH) • July 2004
MVC
Models • persintence-layer • validations • data manipulation methods •
define relations • CRUD
None
Views • templates • html (erb, haml, slim), xml, pdf,
json • custom languages
None
None
Controllers • get, post, patch, put, delete,… • parameter parsing
• session / cookie management
None
REST
generators • rails generate model Product name description:text • rails
generate controller products • rails generate mailer OrderMailer • rails generate migration AddActiveToProducts active:boolean • rails generate scaffold products • ‘rails generate’ to view all possibilities
Migrations • rake db:migrate • rake db:migrate:rollback • rake db:migrate:redo
Migrations
$ rake • rake is to ruby what make is
to C • run little ruby scripts • often used for cronjobs • rake -T
Convention Over Configuration
Sinatra
Sinatra
Development
Ruby Version Management • chruby • rvm
Bundler • gem version management • bundle install rails •
bundle update rails • bundle exec rails console • Gemfile & Gemfile.lock
Bundler
Tests • mini_test, unit_test • RSpec • cucumber • capybara
Run it • Local • bundle exec rails server •
pow.cx
Run it • Online • rack: unicorn, puma, passenger
Deploy • mina • capistrano • cap deploy
Community & Learn
Ruby Tapas
RailsCasts
learn.thoughtbot.com/rails
Ruby Rogues (+parley)
Visit a conference (like ArrrrCamp)
rails girls <3
So…
Ruby makes me happy
Tell a story
Thanks! Let’s have a drink.