From: flebber <flebber.crue@...>
Date: 2010-10-15T07:50:17+09:00
Subject: Re: Nokogiri & Rb 1.9.2-p0

On Oct 15, 12:36 am, flebber <flebber.c...@gmail.com> wrote:
> Is there an error with nokogiri and title recent windows build of ruby
> 1.9.2-p0?
>
> I have installed ruby and nokogiri gem. I was following the railscasthttp://railscasts.com/episodes/190-screen-scraping-with-nokogiri
>
> As I am just learning things I thought I would start by running the
> script from the tutorial.
>
> # To change this template, choose Tools | Templates
> # and open the template in the editor.
>
> # To change this template, choose Tools | Templates
> # and open the template in the editor.
>
> # nokogiri_test.rb
> require 'rubygems'
> require 'nokogiri'
> require 'open-uri'
>
> url = "http://www.walmart.com/search/search-ng.do?
> search_constraint=0&ic=48_0&search_query=batman&Find.x=0&Find.y=0&Find=Find "
> doc = Nokogiri::HTML(open(url))
> puts doc.at_css("title").text
> doc.css(".item").each do |item|
>   title = item.at_css(".prodLink").text
>   price = item.at_css(".PriceCompare .BodyS, .PriceXLBold").text[/\
> $[0-9\.]+/]
>   puts "#{title} - #{price}"
>   puts item.at_css(".prodLink")[:href]
> end
>
> # lib/tasks/product_prices.rake
> desc "Fetch product prices"
> task :fetch_prices => :environment do
>   require 'nokogiri'
>   require 'open-uri'
>
>   Product.find_all_by_price(nil).each do |product|
>     url = "http://www.walmart.com/search/search-ng.do?
> search_constraint=0&ic=48_0&search_query=#{CGI.escape(product.name)}
> &Find.x=0&Find.y=0&Find=Find"
>     doc = Nokogiri::HTML(open(url))
>     price = doc.at_css(".PriceCompare .BodyS, .PriceXLBold").text[/
> [0-9\.]+/]
>     product.update_attribute(:price, price)
>   end
> end
>
> I keep getting this error.
>
> Walmart.com: Search Results for "batman"
> C:/Documents and Settings/Family/My Documents/NetBeansProjects/
> RubyApplication3/lib/main.rb:17:in `block in <main>': undefined method
> `text' for nil:NilClass (NoMethodError)
>         from C:/Ruby192/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.3.1-x86-
> mingw32/lib/nokogiri/xml/node_set.rb:239:in `block in each'
>         from C:/Ruby192/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.3.1-x86-
> mingw32/lib/nokogiri/xml/node_set.rb:238:in `upto'
>         from C:/Ruby192/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.3.1-x86-
> mingw32/lib/nokogiri/xml/node_set.rb:238:in `each'
>         from C:/Documents and Settings/Family/My Documents/
> NetBeansProjects/RubyApplication3/lib/main.rb:15:in `<main>'
>
> similar error from scite
>
> >ruby myrubyNoki.rb
>
> myrubyNoki.rb:17:in `block in <main>': undefined method `text' for
> nil:NilClass (NoMethodError)
>         from C:/Ruby192/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.3.1-x86-mingw32/
> lib/nokogiri/xml/node_set.rb:239:in `block in each'
>         from C:/Ruby192/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.3.1-x86-mingw32/
> lib/nokogiri/xml/node_set.rb:238:in `upto'
>         from C:/Ruby192/lib/ruby/gems/1.9.1/gems/nokogiri-1.4.3.1-x86-mingw32/
> lib/nokogiri/xml/node_set.rb:238:in `each'
>         from myrubyNoki.rb:15:in `<main>'
> Walmart.com: Search Results for "batman"
>
>
>
>
>
>
>
> >Exit code: 1

Nobody else having issues with this? Any easy way to fix. I have
updated gems and made sure all dependencies are covered but no go.
Should I go back to 1.9.1 or 1.8.9 ro get compatibility?