class.ilExerciseSearch.php

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<?php

declare(strict_types=1);
class ilExerciseSearch extends ilAbstractSearch
{
    public function performSearch(): ilSearchResult
    {
        $this->setFields(array('instruction','title'));

        $where = $this->__createWhereCondition();
        $locate = $this->__createLocateString();

        $query = "SELECT exc_id, id  " .
            $locate .
            "FROM exc_assignment " .
            $where;

        $res = $this->db->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $this->search_result->addEntry(
                (int) $row->exc_id,
                'exc',
                $this->__prepareFound($row),
                (int) $row->id
            );
        }
        return $this->search_result;
    }
}