Hi,
My guess is that it's because you're using the latest version of SMW from
SVN - it's still under development, and some of the other extensions aren't
yet compatible with it. If that's the case, you should instead use this SVN
URL:
http://svn.wikimedia.org/svnroot/mediawiki/tags/extensions/SemanticMediaWiki/REL_1_5_6/
-Yaron
On Tue, May 10, 2011 at 12:22 PM, Schott, Peter D (Pete) <
pete.sch...@alcatel-lucent.com> wrote:
> I'm working on using the SMWquery object to do queries on properties. The
> queries on single properties is working fine for the various property types.
>
> Moving on to do queries on 2 properties doesn't seem to work as I expected.
> Using [0] and the Semantic MediaWiki API documentation [1] as a references,
> I am have the following PHP snippet:
> ====
> $numberValue = new SMWNumberValue('number');
> $numberValue->setUserValue('700');
> $description = new SMWValueDescription($numberValue);
> $property = SMWPropertyValue::makeProperty('EngageContainerType');
> $containerDescription = new SMWSomeProperty($property, $description);
>
> $wikiPage = SMWWikiPageValue::makePage('Engage_Thread', NS_MAIN);
> $description2 = new SMWValueDescription($wikiPage);
> $property2 = SMWPropertyValue::makeProperty('EngageObject');
> $objectDescription = new SMWSomeProperty($property2, $description2);
>
> $queryDescription = new SMWConjunction(array($containerDescription,
> $objectDescription));
> $query = new SMWQuery($queryDescription);
> $result = $this->store->getQueryResult($query);
> $this->printResult($result->getResults());
> ====
>
> that reports -> Fatal error: Call to a member function getQueryResult() on
> a non-object
> on line -> $result = $this->store->getQueryResult($query);
>
> If I code them up as separate queries they work just fine. I am sure it's
> pilot error but reviewing [1] hasn't helped as of yet. SMH...
>
> [0]
> http://www.semantic-mediawiki.org/wiki/User:Ganqqwerty/programming_examples
> [1] http://semantic-mediawiki.org/doc/
>
> Any guidance or suggestions would be greatly appreciated.
> cheers
>
> Pete Schott
> Research Engineer
> Alcatel-Lucent Bell Laboratories
> Application Research - Intuitive Collaboration Department
>
> office: 908.582.8163
> mobile: 908.745.8230
>
>
>
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Learn how Intel has extended the reach of its next-generation tools
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