From: Farrel Lifson <farrel.lifson@...>
Date: 2006-03-08T19:50:21+09:00
Subject: Re: [newbie] REXML, each_element and XPath

It seems that when xpathing with an attribute @doc.each_element
returns an array containting the attributes:

irb(main):009:0> @doc = REXML::Document.new(<<EOF
irb(main):010:1" <doc><element attribute="value"/><element attribute="value"/></
doc>
irb(main):011:1" EOF
irb(main):012:1> )
irb(main):016:0> @doc.each_element("doc/element/@attribute")
=> [attribute='value', attribute='value']

Not sure if this is a bug. I'm using the version of REXML that comes
with  1.8.2 on Windows.

Farrel


On 3/8/06, Thibaut Barr�re <thibaut.barrere@gmail.com> wrote:
> Hi!
>
> while playing with REXML I try to use each_element with an x-path
> expression involving an attribute (doc/element/@attribute) but can't
> get it to work this way (it works perfectly fine with both XPath.each
> and each_element applied on doc/element without @attribute).
>
> here's my test suite to illustrate this, is there some obvious mistake
> that I cannot see ? I've read in older posts that each_element did not
> recurse, would it be the explanation ?
>
> any insight most welcome!
>
> kind regards
>
> Thibaut
>
> ============
>
> require "test/unit"
> require "rexml/document"
> include REXML
>
> class XmlTests < Test::Unit::TestCase
>
>   # fail
>   def test_each_element_with_attribute
>         count = 0
>         @doc.each_element("doc/element/@attribute") { |n| count = count+1 }
>         assert_equal 1,count
>   end
>
>   # pass
>   def test_each_element_without_attribute
>         count = 0
>         @doc.each_element("doc/element") { |n| count = count+1 }
>         assert_equal 1,count
>   end
>
>   # pass
>   def test_xpath
>     count = 0
>         XPath.each(@doc,"doc/element/@attribute") { |n| count = count+1 }
>         assert_equal 1,count
>   end
>
>   def setup
>         @doc = Document.new(<<EOF
>                 <doc>
>                         <element attribute="value"/>
>                 </doc>
> EOF
>     )
>   end
>
> end
>
>
>