gistfile1.rb

#!/bin/env ruby
# encoding: utf-8
require 'open-uri'
require 'nokogiri'
require 'sequel'
require 'mysql2'
require 'pry'

##URL + Parse
url_planeo	= "http://www.planeo.pt/"
dat_planeo	= Nokogiri::HTML(open(url_planeo))

#DB connect + Dataset

DB = Sequel.mysql2('patinhas', :user => 'patinhas', :password => 'patinhas', :host => 'localhost')
dataset = DB[:ofertas]



planeo = dat_planeo.css('.panel-body')
planeo.each do | dat_planeo | 
id		= dat_planeo.at_css('.deal-image a')['href'].match( /(?:[^\/]*\/){4}([^\/]*)/ )[1].to_s
site 	= "Planeo.pt".to_s
camp 	= dat_planeo.at_css('.deal-title').text.gsub(/\t|\n|\€/,'').to_s
link	= "http://www.planeo.pt"+dat_planeo.at_css('.deal-image a')['href']
imagem	= dat_planeo.at_css('.deal-image a img')['src']
pvp		= dat_planeo.at_css('.deal-price').text.gsub(/\t|\n|\€/,'')
pvr		= dat_planeo.at_css('.deal-title s').text.gsub(/\t|\n|\€/,'')
percent	= dat_planeo.at_css('.deal-discount').text.gsub('%','')
portes	= 0
datetime= Date.parse(Time.now.to_s).strftime("%Y-%m-%d")


dataset.insert(:id => id, :site => site, :desc => camp, :link => link, :img => imagem, :pvp => pvp, :pvr => pvr, :percent => percent, :portes => portes, :data => datetime)

end



exeption

 ruby sql_planeo.rb 
sql_planeo.rb:22:in `block in <main>': undefined method `[]' for nil:NilClass (NoMethodError)
	from /var/lib/gems/1.9.1/gems/nokogiri-1.6.3.1/lib/nokogiri/xml/node_set.rb:237:in `block in each'
	from /var/lib/gems/1.9.1/gems/nokogiri-1.6.3.1/lib/nokogiri/xml/node_set.rb:236:in `upto'
	from /var/lib/gems/1.9.1/gems/nokogiri-1.6.3.1/lib/nokogiri/xml/node_set.rb:236:in `each'
	from sql_planeo.rb:21:in `<main>'