repensando o desenvolvimento web com ruby on rails

Ruby on RailsRepensando o Desenvolvimento Web com

segunda-feira, 21 de setembro de 2009

RailsRails


ComunidadeComunidade


FilosofiaFilosofia


DanteRegis.com

@danteregis

Admin de Redes - TJ/SE


DanteRegis.com

@danteregis

Admin de Redes - TJ/SE

http://slideshare.net/danteregis


Você não vai aprenderRuby on Rails aqui


framework


David Heinemeier Hansson2004


37signals


1400+desenvolvedores


http://rubyonrails.com


jul/2004 0.5

dez/2005 1.0

mar/2006 1.1

jan/2007 1.2

dez/2007 2.0

jun/2008 2.1

nov/2008 2.2

mar/2009 2.3

algum dia (em 2009?) 3.0


Empregos(fonte: indeed.com)


MVC


opiniated


eXtreme Programming


TDD


REST


modularização


DRY


Convention over

Configuration


KISS


script/console


Model


Model

id: integer

name: string

price: float

category_id: integer

stock: integer

created_at: datetime

updated_at: datetime


Model

id: integer

name: string

price: float


stock: integer



x = Product.new


Model

id: integer

name: string

price: float


stock: integer



x = Product.newx.name = "Pão Jacó"


Model

id: integer

name: string

price: float


stock: integer



x = Product.newx.name = "Pão Jacó"x.stock = "100


Model

id: integer

name: string

price: float


stock: integer



x = Product.newx.name = "Pão Jacó"x.stock = "100x.price = 0.15


Model

id: integer

name: string

price: float


stock: integer



x = Product.newx.name = "Pão Jacó"x.stock = "100x.price = 0.15x.save


Model


Model

INSERT INTO `products` COLUMNS (`name`, `price`, `stock`) VALUES ("Pão Jaco", 0.15, 100);


Model


Model

Product.first


Model

Product.first

Product.find_all_by_category_id(10)


Model

Product.first


Product.find_or_create_by_name("Margarina")


Model

Product.first



Product.count


Model

Product.first



Product.count

Product.average('price')


validations


associations


instance methods


Model

class Product < ActiveRecord::Base

end


Model


endsegunda-feira, 21 de setembro de 2009

Model


end

belongs_to :category


Model


end

belongs_to :category validates_presence_of :name


Model


end

belongs_to :category validates_presence_of :name validates_numericality_of :stock


Model


end

belongs_to :category validates_presence_of :name validates_numericality_of :stock

def consume! stock -= 1 save end


p = Product.new(:stock => "xxxxx")


p = Product.new(:stock => "xxxxx")p.save


p = Product.new(:stock => "xxxxx")p.save#=> false


p = Product.firstp.categoryp.category.name = "Mudei o nome"p.category.save


has_many


class Category < ActiveRecord::Base has_many :productsend


cat.productscat.products.newcat.products.first


named scope


class Product < ActiveRecord::Base named_scope :low_stock, :conditions => ['stock <= 10']end


Product.low_stock#=> [.....]


Product.low_stock#=> [.....]

category.products.low_stock#=> [...]


SQL?


migrations


controle de versão


do banco de dados!


sem SQL!


class AddQuantityToCartProduct < ActiveRecord::Migration


class AddQuantityToCartProduct < ActiveRecord::Migration def self.up add_column :cart_products, :quantity, :integer end


class AddQuantityToCartProduct < ActiveRecord::Migration def self.up add_column :cart_products, :quantity, :integer end

def self.down drop_column :cart_products, :quantity endend


com SQL!


> 90%experiência pessoal


ActionController


session


render


filters


class ApplicationController < ActionController::Base before_filter :check_login def check_login render :text => "acesso negado!" endend


flash


flash[:notice] = "Você logou no sistema"


cookies


respond_to


ActionView


erb


haml


erb


form_tagform_for


<div> <span><%= flash[:notice] %></span></div><div> <% form_tag do %> <p> Usuário: <%= text_field_tag 'username' %> </p> <p> Senha: <%= password_field_tag 'password' %> </p> <p> <%= submit_tag 'Entrar' %> </p> <% end %></div>


Tempo para falar mal de certas “soluções”


Fim do tempo para falar mal de certas

“soluções”


Comunidade


RailsConfhttp://railsconf.com


Rails Summit Latin America

http://railssummit.com.br


13 e 14 de outubroSão Paulo/SP


Aldo França


Great Blogs ‘n People


Akita on Railshttp://akitaonrails.com


Carlos Brandohttp://nomedojogo.com


Ozéias Sant’anahttp://railsbox.org


Bruno Mirandahttp://brunomiranda.com


Ruby Ondahttp://rubyonda.com


Nando Vieirahttp://simplesideias.com.br


PeepCodehttp://peepcode.com


RailsCastshttp://railscasts.com


http://slideshare.net/danteregis


[email protected]


repensando o desenvolvimento web com ruby on rails

Technology