/**
* @param FinderConfiguration $configuration
*
* @return array|null
*/
protected function generatePreSearchFilter(FinderConfiguration $configuration)
{
$filter = null;
$descriptionEntity = $configuration->getDescriptionEntity();
$filtersColumn = $this->getFilterSearchColumn($configuration->getSearchIndex('prefilters'), $descriptionEntity);
if (!empty($filtersColumn)) {
$filter = array('$and' => $filtersColumn);
}
return $filter;
}
