I can't get the examples working with Semantic MediaWiki Version 1.8.0.1.
$propertyValue = SMWPropertyValue::makeProperty('Test');
$property = new SMWSomeProperty($propertyValue, new SMWThingDescription);
This produces the following error:
PHP Catchable fatal error: Argument 1 passed to SMWSomeProperty::__construct() must be an instance of SMWDIProperty, instance of SMWPropertyValue given, called in /srv/httpd/mediawiki/extensions/SidebarLanguagelink/SidebarLanguagelink.php on line 38 and defined in /srv/httpd/mediawiki/extensions/SemanticMediaWiki/includes/storage/SMW_Description.php on line 786
I did manage to do some queries based on the examples, but I think they won't work with the current version of SMW. Here's an example which looks up the value for a property "Master_page" on the current page, and returns the value of that property:
function getCanonical() {
global $wgTitle;
$masterPageProperty = new SMWDIProperty('Master_page');
$title = Title::newFromText( $wgTitle->mTextform );
$currentArticle = SMWDIWikiPage::newFromTitle( $title );
$semanticData = smwfGetStore()->getSemanticData( $currentArticle );
$masterPagePropVals = $semanticData->getPropertyValues( $masterPageProperty );
$masterPageProp = array_pop( $masterPagePropVals );
if ( is_null( $masterPageProp ) ) return NULL;
$masterPage = $masterPageProp->getDBkey();
$canonicalTitle = Title::newFromText( $masterPage );
return SMWDIWikiPage::newFromTitle( $canonicalTitle );
}
Here's an example that finds all pages which have the same value for a particular property "Master_page", sorted by a "Language_code" property:
function getTranslations(&$canonicalTranslation) {
$masterPageProperty = new SMWDIProperty('Master_page');
$description = new SMWValueDescription( $canonicalTranslation );
$property = new SMWSomeProperty( $masterPageProperty, $description );
$query = new SMWQuery( $property );
$query->sort = true;
$query->sortkeys = array('Language_code' => 'ASC');
$queryResult = smwfGetStore()->getQueryResult( $query );
return $queryResult->getResults();
}
Perhaps such examples are best written in actual PHP files, put in SemanticMediaWiki/docs/technical/examples/. Then they could have simple tests executed by the CI, ensuring they stay up to date with the SMW version they are bundled with.
