zhengjia

=Navigating=
    visit('/projects')
    visit(post_comments_path(post))

=Clicking links and buttons=
    click_link('id-of-link')
    click_link('Link Text')
    click_button('Save')
    click('Link Text') # Click either a link or a button
    click('Button Value')

gouvermxt

#------------------------------------------------------------------------------
# Rotinas para verificação de CPF e CNPJ
# Linguagem: Ruby
# Escrito por: André Camargo < andre@boaideia.inf.br > http://blog.boaideia.inf.br
# Use, copie, melhore a vontade! Patches são bem-vindos...
#------------------------------------------------------------------------------
def check_cpf(cpf=nil)
  return false if cpf.nil?

  nulos = %w{12345678909 11111111111 22222222222 33333333333 44444444444 55555555555 66666666666 77777777777 88888888888 99999999999 00000000000}

jcasimir

Transactions

As your business logic gets complex you may need to implement transactions. The classic example is a bank funds transfer from account A to account B. If the withdrawal from account A fails then the deposit to account B should either never take place or be rolled back.

Basics

All the complexity is handled by ActiveRecord::Transactions. Any model class or instance has a method named .transaction. When called and passed a block, that block will be executed inside a database transaction. If there's an exception raised, the transaction will automatically be rolled back.

Example

jcasimir

Render and Redirect

The normal controller/view flow is to display a view template corresponding to the current controller action, but sometimes we want to change that. We use render in a controller when we want to respond within the current request, and redirect_to when we want to spawn a new request.

Render

The render method is very overloaded in Rails. Most developers encounter it within the view template, using render :partial => 'form' or render @post.comments, but here we'll focus on usage within the controller.

:action

kinopyo

# lib/custom_logger.rb
class CustomLogger < Logger
  def format_message(severity, timestamp, progname, msg)
    "#{timestamp.to_formatted_s(:db)} #{severity} #{msg}\n"
  end
end

logfile = File.open("#{Rails.root}/log/custom.log", 'a')  # create log file
logfile.sync = true  # automatically flushes data to file
CUSTOM_LOGGER = CustomLogger.new(logfile)  # constant accessible anywhere

them0nk

#Model 

@user.should have(1).error_on(:username) # Checks whether there is an error in username 
@user.errors[:username].should include("can't be blank")  # check for the error message 

#Rendering
response.should render_template(:index)

#Redirecting 
response.should redirect_to(movies_path)

sauloarruda

Configurando aplicação Rails com Nginx e Unicorn

TL;DR Como configurar uma aplicação Rails usando Nginx + Unicorn + Upstart + RVM (gemset por aplicação).

Dependências: (TODO) Configuração de Servidor Nginx

Essas instruções são aplicáveis para o seguinte ambiente:

• Sistema Operacional: Ubuntu Server 12.04 beta2
• Servidor: AWS EC2 usando ESB AMI: ubuntu/images-milestone/ebs/ubuntu-precise-12.04-beta2-amd64-server-20120328 (ami-b5ea34dc)

keyboardsurfer

# Copyright: Benjamin Weiss (keyboardsurfer) https://github.com/keyboardsurfer
# Under CC-BY-SA V3.0 (https://creativecommons.org/licenses/by-sa/3.0/legalcode)

# built application files
*.apk
*.ap_
*.jar
!gradle/wrapper/gradle-wrapper.jar

# lint folder

daltonjorge

Active Record

É um design pattern que o Rails implementa a partir da gem ActiveRecord.

Serve para conectar a camada Model da aplicação com tabelas do database, para assim criar um modelo de domínio persistível, onde a lógica (Model) e dados (BD) são apresentados em uma única solução.

Já persiste no BD:

obj.create

terryjray

RAILS_ENV=production rake db:setup
# produces the error below.....hmmm.....it's a no-worky
psql:/yourprojectpath/yourproject/db/structure.sql:29: ERROR:  could not open extension control file "/usr/share/postgresql/9.1/extension/hstore.control": No such file or directory

# hstore postgresql extension needs to be installed, so....
sudo apt-get install postgresql-contrib

# now your extension should be available to enable so log in with psql
psql -d yourproject_production -U yourdbuser -W