Desenvolvimento Ágil com Ruby on Rails

Desenvolvimento gil com Ruby on

Rails

segunda-feira, 29 de abril de 13

http://bit.ly/agile-webdev-rails

http://pragprog.com/book/rails4/agile-web-development-with-railshttp://pragprog.com/book/rails4/agile-web-development-with-rails

"Programmers should always be interested in

learning new languages, preferably from an

unfamiliar paradigm"

"97 Things Every Programmer Should Know"


Ruby on Rails um framework em Ruby


https://www.ruby-toolbox.com/categories/web_app_frameworks

Sinatra, Padrino, Merb, Espresso

https://www.ruby-toolbox.com/categories/web_app_frameworkshttps://www.ruby-toolbox.com/categories/web_app_frameworks

Conhecendo um pouco de Ruby


Ruby From Other Languages

http://bit.ly/ruby-from-other

http://www.ruby-lang.org/en/documentation/ruby-from-other-languages/http://www.ruby-lang.org/en/documentation/ruby-from-other-languages/

Interpretado

#app.rbputs Meet2Brains

$ ruby app.rbMeet2Brains


Uso de Blocos

my_list = [1,2,3,4,5]

my_list.each do |item| # deal with itemend


Tudo tem valor

x = 10y = 11

z = if x < y 1else 2end

z # => 1


Tudo objeto10.times{ |n| puts n }



10.class=> Fixnum



10.class=> Fixnum

Fixnum.class=> Class



10.class=> Fixnum

Fixnum.class=> Class

Fixnum.ancestors=> [Fixnum, Integer, Numeric, Comparable, Object, Kernel, BasicObject]


# This1 + 2# Is the same as this ...1.+(2)# Which is the same as this:1.send "+", 2


Metaprogramao


class Car def inspect Cheap car endend



other_car = Car.newother_car.inspect # => Cheap car



porsche = Car.newporsche.inspect # => Cheap car

def porsche.inspect Expensive carend

porsche.inspect # => Expensive car

other_car = Car.newother_car.inspect # => Cheap car


class Fixnum def hours self * 3600 # number of seconds/hour end alias hour hoursend

# 14 hours from 00:00 January 1stTime.mktime(2006, 01, 01) + 14.hours # => Sun Jan 01 14:00:00


class Fixnum def hours self * 3600 # number of seconds/hour end alias hour hoursend

# 14 hours from 00:00 January 1stTime.mktime(2006, 01, 01) + 14.hours # => Sun Jan 01 14:00:00

Time.mktime(2006, 01, 01) + 14.hours # => Sun Jan 01 14:00:00


Time.now + 2.days# => 2013-05-01 12:40:57 -0300

#Rails


Dica?


http://tryruby.org

http://tryruby.org/http://tryruby.org/

RubyGems


Software Package


AutenticaoPaginaoImagensTasksFilas...


$ gem install rails


Ruby on Rails


Agil


MVCsegunda-feira, 29 de abril de 13

Rails Philosophy


Dont Repeat Yourself (DRY)


Layouts, Views, Partials


Layouts, Views, Partials# application.html.erb

HelpersFORMS, TAGS, HTML BLOCKS, SUPPORT, FORMATS, ...


Model - Scope


Model - Scope

@published = Post.where(published: true)


Model - Scope


class Post < ActiveRecord::Base scope :published, where(published: true)end


Model - Scope


class Post < ActiveRecord::Base scope :published, where(published: true)end

@published = Post.published


Convention over Configuration (CoC)


123456789101112131415161718192021

#config/routes.rbresources :posts

#app/controllers/posts_controller.rbclass PostsController < ApplicationController

def index @posts = Post.published end

# ...end

#app/views/posts/index.html.erbPosts

#app/views/posts/_post.html.erb


RESTful


resources :photos


Migrations

Migrations are a convenient way for you to alter your database in a structured and organized manner


class CreateProducts < ActiveRecord::Migrationdef upcreate_table :products do |t|t.string :namet.text :descriptiont.timestampsendenddef downdrop_table :productsendend


TestesTDD, BDD


Extensvel

Autenticao, paginao, manipulao/upload de imagens, webservice, privilgios, pdf, csv, xml, json, filas,

monitoramento, database drivers, ...


Quem usa?


www.adena.com.br

http://www.giran.com/brhttp://www.giran.com/br

http://rubyonrails.org/applications

http://rubyonrails.org/applicationshttp://rubyonrails.org/applications

Referncias

http://bit.ly/ZV7NLZ

http://bit.ly/ZV7NLZhttp://bit.ly/ZV7NLZ

Technology

Desenvolvimento Ágil com Ruby on Rails