Set fulltext as false if there is no element for fulltext index

Classes/Common/Solr/SolrSearch.php

@@ -669,14 +669,15 @@ protected function searchSolr($parameters = [], $enableCache = true)
  $grouping->setLimit(100); // Results in group (TODO: check)
  $grouping->setNumberOfGroups(true);
 
- if ($parameters['fulltext'] === true) {
+ $fulltextExists = $parameters['fulltext'] ?? false;
+ if ($fulltextExists === true) {
  // get highlighting component and apply settings
  $selectQuery->getHighlighting();
  }
 
  $solrRequest = $solr->service->createRequest($selectQuery);
 
- if ($parameters['fulltext'] === true) {
+ if ($fulltextExists === true) {
  // If it is a fulltext search, enable highlighting.
  // field for which highlighting is going to be performed,
  // is required if you want to have OCR highlighting
@@ -703,7 +704,7 @@ protected function searchSolr($parameters = [], $enableCache = true)
  $resultSet['numberOfToplevels'] = $uidGroup->getNumberOfGroups();
  $resultSet['numFound'] = $uidGroup->getMatches();
  $highlighting = [];
- if ($parameters['fulltext'] === true) {
+ if ($fulltextExists === true) {
  $data = $result->getData();
  $highlighting = $data['ocrHighlighting'];
  }