[datatables] ($store) must be of type SMW\SQLStore\SQLStore, SMW\SPARQLStore\SPARQLStore given #827
Comments
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Hello @simontaurus as far as I understand you are using as SPARQLStore, is that correct ? I haven't tested it directly, however I think that QueryEngineFactory (for it to work) should be a subclass of |
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Thank you for your response. Correct, I'm using a SPARQLStore. |
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hello @simontaurus I've checked but I need to test with a SPARQLStore and I don't have it installed right now. Is there any docker container that I can use for this purpose ? |
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One option would be our docker image / compose-stack |
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After doing some research on that I still do not understand in which cases SMW passes an While
So theoretically using this basestore should work, but any try to provide a public function getSearchPanes( $printRequests, $searchPanesOptions ) {
if ( !( $this->datatables->store instanceof \SMW\SQLStore\SQLStore ) ) { // we got a SPARQLStore
// $this->datatables->store = new SQLStore(); // fails, see exception
// $this->datatables->store = \SMW\Services\ServicesFactory::getInstance()->getStore(); // fails, see exception
// $this->datatables->store = \SMW\StoreFactory::getStore( "\SMW\SQLStore\SQLStore" ); // fails, see exception
// $this->datatables->store = $this->datatables->store->baseStore; // fails, private property 'baseStore'
$closure = \Closure::bind(function &(\SMW\SPARQLStore\SPARQLStore $class) { // dirty hack to access private member
return $class->baseStore;
}, null, \SMW\SPARQLStore\SPARQLStore::class);
$this->datatables->store = &$closure($this->datatables->store); // fails, see exception
}
}Exception (may indicate a dirty state on the DB due to a previous exception while playing around with some dirty hacks) |
Setup
Issue
(@thomas-topway-it)
Sporadically pages with a datatables query throw the mentioned error, probably when a purge is executed but it's hard to reproduce
The corresponding line is now in:
SemanticResultFormats/formats/datatables/SearchPanes.php
Line 51 in 6dd7e46
Not sure in which cases QueryResult->getStore() returns
SMW\SPARQLStore\SPARQLStorein a SPARQLStore setup.SemanticResultFormats/formats/datatables/DataTables.php
Line 510 in 6dd7e46
Workaround is to catch cases where
SMW\SPARQLStore\SPARQLStoreis givenSteps to reproduce
Expected result: No exception
Observed result: exception occurs:
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