Forum: Ruby nokogiri xpath method

Hi I am having a problem in nokogiri::HTML::Document.xpath method
for the site
http://services.ptcmysore.gov.in/RNetTracking/Trac...
Code
doc=
agent.get("http://services.ptcmysore.gov.in/RNetTracking/Trac...)

page1 = Nokogiri::HTML(open(doc.uri.to_s))

x = [page1.css("#GridView1 th")[0].text,page1.css("#GridView1
td")[0].text,page1.css("#GridView1 th")[1].text,page1.css("#GridView1
td")[1].text,page1.css("#GridView1 th")[2].text,page1.css("#GridView1
td")[2].text,page1.css("#GridView1 th")[3].text,page1.css("#GridView1
td")[3].text]
puts x
puts page1.css('#pnlDetail div #GridView2 tr th')[0].text#Error

india.rb:22:in `<main>': undefined method `text' for nil:NilClass
(NoMethodError
)

adding myself to this trail from personal interest.

Subject: nokogiri xpath method
  Date: dom 03 feb 13 04:41:53 +0900

Quoting gaurav shirodkar (lists@ruby-forum.com):

> india.rb:22:in `<main>': undefined method `text' for nil:NilClass
> (NoMethodError
> )

What's your problem there? Check line 22 of your source code. It has
to be that one of the CSS tags you ask for does not exist in your
page. Instead of immediately asking for, let's say

> page1.css("#GridView1 th")[0].text

you should first check if

page1.css("#GridView1 th")

is not null. Or maybe catch the exception? You should refactor...

Carlo

On Sun, Feb 3, 2013 at 9:48 AM, Carlo E. Prelz <fluido@fluido.as> wrote:

> You should refactor...

Definitively: I can see serious violation of DRY. :-)

Cheers

robert