Ruby On Rails

Master on Free Software

Ruby (on Rails)

Asís and David{asis.garcia, david.barral}@trabesoluciones.com


Outline (1)Social axis

- License- Comunity- Bussiness- Resources

Historical axis- Matz- Versions- Future

Technological axis- Source code- Tools- Platform


Outline (2)Social axis

- Licencense- Comunity- Bussiness- Resources

Historical axis- DHH and 37signals- Versions- Future

Technological axis- Source code- Tools- Platform- Deployment


Ruby is born


There is something about Ruby

Philosophy Focus on programmers productivity and “joy” Follows good IU design principles

“We are the masters, they are the slaves” Principle of least surprise (POLS)

License: Matz own terms Can be overriden with GPL


Ruby's story


Ruby basic install

Available as package on most systems$ sudo apt-get install ruby irb rdoc ir

$ ruby -v

As source code$ wget ftp://ftp.ruby-lang.org/pub/ruby/stable/ruby-1.8.6.tar.gz

$ tar xvfz ruby-1.8.6.tar.gz

$ cd ruby-1.8.6

$ ./configure

$ make

$ make test

$ make install


Ruby from the code (1)

Dynamic types

Object Oriented: Everything is an object



Even classes are objects.

Weird? Not much, remember Smalltalk



Even nil is an object !!!

[Only for pros] Redefine/Extend NilClass, OMG !!!



Ranges Arrays Hashes Symbols Operator

overload



Everything returns a value



Regular Expressions

Only nil and false are false



Control structures

if, unless pre/postfix

?: case



Loops Closures (more about them later)


Ruby from the code (9) Enumerables



Closures



Multiple syntax: heaven or hell? Internal DSLs



Class morphology

local => var

instance => @var

class => @@var

self

Multiple syntax !!



Access levels: public, protected, private



Modules Logic

agroupations Namespaces



Mixins Code

inclussions Multiple

inheritance workaround



Duck typing



Method missing: Prevent errors, easy proxies and decorators, black magic (see Rails)





Introspection

Meta programming

Class reopening



More control structures Exceptions Requires Core libraries include vs. extend Threads Tons of other stuff...


Ruby Tools (1)

Irb: Interactive ruby shell[david@io ~]

$ irb

>> 5+5

=> 10

>> class Dog

>> end

=> nil

>> dog = Dog.new

=> #<Dog:0x2aaaaabb0ba0>


Ruby Tools (2)

Rdoc

$ rdoc rdoc_example.rb


Ruby Tools (3)

RI$ ri Array.delete_if

-------------------------------------------------------- Array#delete_if

array.delete_if {|item| block } -> array

------------------------------------------------------------------------

Deletes every element of _self_ for which _block_ evaluates to

+true+.


Ruby tools (4)

Rake

$ rake -f rake_example.rake

Hello World!

Like make Ruby DSL Everything is Ruby


Ruby tools (5)

Gem yum|apt like tool: ruby package manager$ gem search rails

$ sudo gem install rails -v1.2.5

$ gem list

*** LOCAL GEMS ***

actionmailer (2.0.2, 2.0.1, 1.3.3, 1.3.2, 1.2.5)

actionpack (2.0.2, 2.0.1, 1.13.3, 1.13.2, 1.12.5)

actionwebservice (1.2.6, 1.2.3, 1.2.2, 1.1.6)

activerecord (2.0.2, 2.0.1, 1.15.3, 1.15.2, 1.14.4)

...


Ruby tools (6)

Installing Gem (on Ubuntu)

$ sudo apt-get install libyaml-ruby libzlib-ruby

$ wget http://rubyforge.org/frs/download.php/29548/rubygems-1.0.1.tgz

$ tar xvfz rubygems-1.0.1.tgz

$ cd rubygems-1.0.1

$ sudo ruby setup.rb

$ sudo ln -s /usr/bin/gem1.8 /usr/bin/gem


Ruby resources ruby-lang.org

en.wikipedia.org/wiki/Ruby_(programming_language)

www.ruby-doc.org

www.ruby-forum.com

rubyforge.org

jobs.rubynow.com

rubyconf2007.confreaks.com

google.com and ask for Ruby politely


Rails is born


There is something about Rails

Web MVC framework (action oriented) DRY: don't repeat yourself CoC: convention over configuration Opinionated

“Mix Java and PHP” Marketing + buzz MIT License


Rails' story


Rails request overview


Rails from the code (1)





More on this later...


Rails tools

Console Generators Plugins How??? Wait a little...


To be continued...


Sqlite3 en Ubuntu

$ sudo apt-get install ruby1.8-dev

$ sudo apt-get install sqlite3 libsqlite3-dev

$ sudo gem install sqlite3-ruby


... here we continue


More on rails

More about validations

More on routes

Session storage

Filters

More on environments

Ajax

ERB alternatives: Haml, Markaby

Advanced Active Record

Mailers

Caching

Custom generators

Some nice plugins

How to extend Rails

Capistrano

Rails 2.0...


Rails 2.0 (1)

REST


Rails 2.0 (2)


Rails 2.0 (3)

Sexy migrations


Deployment

“Escalabilidad en Rails” by Pablo A.Delgado

http://www.slideshare.net/pablete/escalabilidad-en-rails

http://amaiac.net/conferenciarails2007/torrents/06_Rails_Hispana_2007_Sala1_Escalabilidad.wmv.torrent


Resources (1) rubyonrails.org wiki.rubyonrails.org agilewebdevelopment.com www.ruby-forum.com www.workingwithrails.com Plugin repositories

agilewebdevelopment.com/plugins www.railslodge.com wiki.rubyonrails.org/rails/pages/Plugins


Resources (2)

Blogs weblog.rubyonrails.com www.loudthinking.com www.therailsway.com www.zedshaw.com 4trabes.com

Listas lists.rubyonrails.org/mailman/listinfo/rails lists.simplelogica.net/mailman/listinfo/ror-es


That's all folks!!

Ruby On Rails

Technology

free software

social axis license

comunity bussiness

tools versions

platform futuremaster

rails ass