Add comment nodes outside root with ruby-libxml

Question

I am writing an xml exporter in ruby and I am using libxml package for it. I want to write some comment nodes outside the root element

<?xml version="1.0" encoding="UTF-8"?>
<!-- comment -->
<root>
 <childnode />
</root>

How do I accomplish export to above format?

Sample ruby code to generate the above (without accounting for comment node)

doc = XML::Document.new()
rootNode = XML::Node.new('root')
doc.root = rootNode
childNode = XML::Node.new('childnode')
childnode << rootNode

Only operation i can do on the documnet object is setting its root — Schu, Aug 25 '11 at 18:29
However, I can create comment nodes and add them under the root node — Schu, Aug 25 '11 at 18:30
Nokogiri lets you do that. Nokogiri is based on libxml2 too and is a better wrapper than ruby-libxml. — Serabe, Aug 27 '11 at 11:50
i tried nokogiri as well. i use builder to export. so within the builder code, we have some how create the comment node. Based on the nokogiri API, i need to get hold of "Document" from the builder object to add a comment, which I wasnt able to figure out. — Schu, Aug 27 '11 at 15:04
Take a look at last part [here](http://nokogiri.org/Nokogiri/XML/Builder.html) — Serabe, Aug 27 '11 at 17:32
i remember ruby throwing a null reference for xml.doc access (xml is anonymous variable), not too sure though. i will check again after the weekend. tyvm — Schu, Aug 27 '11 at 23:00

score 0 · Accepted Answer · answered Oct 13 '11 at 18:58

0

ended up editing the xml string manually to add the comments outside the root node (for both libxml and nokogiri

answered Oct 13 '11 at 18:58

Schu

osdevkid · Answer 2 · 2011-09-07T05:13:58.827

-2

<?xml version="1.0" encoding="UTF-8" ?>
<List type = "" =”00:75:00” =”00:00:05”>

</List>

Yes

<?xml version="1.0" encoding="UTF-8" ?>
<List type = "update" >
</List>

edited Sep 07 '11 at 05:13

answered Sep 07 '11 at 05:03

osdevkid

2 Answers2