/**
* Get a random ID from the Solr index.
*
* @return string
*/
protected function getRandomBibId()
{
$source = $this->getRecordSource();
$query = isset($this->config['Records']['query']) ? $this->config['Records']['query'] : '*:*';
$result = $this->searchService->random($source, new Query($query), 1);
if (count($result) === 0) {
throw new \Exception('Problem retrieving random record from $source.');
}
return current($result->getRecords())->getUniqueId();
}
/**
* Called at the end of the Search Params objects' initFromRequest() method.
* This method is responsible for setting search parameters needed by the
* recommendation module and for reading any existing search parameters that may
* be needed.
*
* @param \VuFind\Search\Base\Params $params Search parameter object
* @param \Zend\StdLib\Parameters $request Parameter object representing user
* request.
*
* @return void
*/
public function init($params, $request)
{
if ("retain" !== $this->mode) {
$randomParams = $this->paramManager->get($params->getSearchClassId());
} else {
$randomParams = clone $params;
}
foreach ($this->filters as $filter) {
$randomParams->addFilter($filter);
}
$query = $randomParams->getQuery();
$paramBag = $randomParams->getBackendParameters();
$this->results = $this->searchService->random($this->backend, $query, $this->limit, $paramBag)->getRecords();
}
