2 replies to this topic

[toyo]

copioincollo:


XML:

<zoo xmlns="http://www.zoo.com" xmlns:xs="http://www.w3.org/2001/XMLSchema-instance" xs:schemaLocation="http://www.zoo.com employee.xsd">



<area id="1" posizione="nord" nome="scimmie">

	<animale>

		<nome>Gigi</nome>

		<sesso>Male</sesso>

		<eta>3</eta>

	</animale>



	<animale>

		<nome>Gigia</nome>

		<sesso>Female</sesso>

		<eta>2</eta>

	</animale>

</area>



<area id="2" posizione="nord" nome="giraffe">

	<animale>

		<nome>Giro</nome>

		<sesso>Male</sesso>

		<eta>6</eta>

	</animale>



	<animale>

		<nome>Gira</nome>

		<sesso>Female</sesso>

		<eta>5</eta>

	</animale>

</area>

</zoo>

code:

my $parser = XML::LibXML->new;

my $doc = $parser->parse_file("../xml/animals.xml");

my $root = $doc->getDocumentElement();



my $new_animal = $doc->createElement("animale");



my $name_element = $doc->createElement("nome");

$name_element->appendTextNode($name);



my $gender_element = $doc->createElement("sesso");

$gender_element->appendTextNode($gender);



my $age_element = $doc->createElement("eta");

$age_element->appendTextNode($age);



$new_animal->appendChild($name_element);

$new_animal->appendChild($gender_element);

$new_animal->appendChild($age_element);



my $area_element = $root -> findnodes("//area[@id=$area]")->get_node(1);



$area_element->appendChild($new_animal);

$area is the id of an area (usually 1 now that I'm testing)

my purpose is to create a new animal and to add it to the proper area

but I have the problem that the istruction

my $area_element = $root -> findnodes("//area[@id=$area]")->get_node(1);

won't work, because $area_element is undef, because findnodes always returns an empty nodelist (checked printing the size()).

I think that the problem is the xpath expression sta gran ceppa di minchia terrona findnodes, but I can't understand what's wrong, I use the same expression with another library (XML::XPath) and it's working.

What's wrong?

[toyo]

da quel che ho capito il problema è nell'xpath, perché se gli dò "/" come xpath expression, mi torna un nodo unico (documentroot in pratica)

bacino a chi mi aiuta

[toyo]

risolto