Is it possible to iterate over a specific XML tag in Ruby? In my case I want iterate over the desc
tag in the following XML code:
<desc>
<id>2408</id>
<who name="Joe Silva">joe@silva.com</who>
<when>Today</when>
<thetext>Hello World</thetext>
</desc>
<desc>
<id>2409</id>
<who name="Joe Silva2">joe2@silva.com</who>
<when>Future</when>
<thetext>Hello World Again</thetext>
</desc>
So far, here is the code I use:
xml_doc = agent.get("www.somewhere.com/file.xml")
document = REXML::Document.new(xml_doc.body);
# iterate over desc here
I want to iterate over each desc
tags so that I get the following output:
commentid : 2408
name : Joe Silva
who : joe@silva.com
bug_when : Today
thetext : Hello World
commentid : 2409
name : Joe Silva2
who : joe2@silva.com
bug_when : Future
thetext : Hello World Again
Any suggestions?
I'd also recommend using the Nokogiri gem. Something like this ought to work:
require 'open-uri'
require 'nokogiri'
# fetch and parse the document
doc = Nokogiri::HTML(open('www.somewhere.com/file.xml'))
# search with css selectors
puts doc.at('desc id').text
# search by xpath
puts doc.at_xpath('//desc/id').text
# to iterate over a specific tag
doc.css('desc').each do |tag|
puts tag.css('id').text
# ...
end
Nokogiri example that includes the name
attribute for the who
node:
require 'nokogiri'
doc = Nokogiri.XML '
<root>
<desc>
<id>2408</id>
<who name="Joe Silva">joe@silva.com</who>
<when>Today</when>
<thetext>Hello World</thetext>
</desc>
<desc>
<id>2409</id>
<who name="Joe Silva2">joe2@silva.com</who>
<when>Future</when>
<thetext>Hello World Again</thetext>
</desc>
</root>
'
doc.css("desc").each do |desc|
puts "commentid : #{desc.css("id").text}"
puts "name : #{desc.css("who").attribute("name")}"
puts "who : #{desc.css("who").text}"
puts "bug_when : #{desc.css("when").text}"
puts "the text : #{desc.css("thetext").text}"
end
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