Hi
This has been driving me nuts for the past hour or two. I'm hoping
someone here knows the answer.
I need to be able to dynamically add some nodes to some xml. The
example below is contrived - but hopefully clear enough so you get the
'picture'
So - say I have a Foo object and I want to add something to a child
node within Foo's xml representation before I send the response back
to the user.
In my controller ...
def show
@foo = Foo.find(params[:id])
respond_to do |format|
format.html # show.html.erb
format.xml { render :xml =>
extend_foo(@foo.to_xml) }
end
end
private
def extend_foo(xml)
parser =
XML::Parser.new(XML::Parser::Context.string(xml))
doc = parser.parse
child_node_xpath = doc.find(" .... insert funky xpath
string
here ....")
child_node = child_node_xpath.first
logger.debug("\n\nbefore ...\n#{child_node.to_s}\n\n")
# this correctly outputs the contents of the
'child_node'
child_node << child = XML::Node.new('new_node')
child['new_node_attribute'] = 'true'
logger.debug("\n\nafter ...\n#{child_node.to_s}\n\n")
# this correctly outputs the contents of the
'child_node' - with
the 'new_node' added (along with the 'new_node_attribute')
# NOTE: everything up to here works great.
end
The problem is that the updated node is not part of the response sent
to the client. For lake of a better term - I can't seem to figure
out how to 'save' the changed node.
Any tips/suggestions/pointers would be greatly appreciated. I'm
using libxml.
Thanks
Dave
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