ApacheSolrForTypo3 cant' get result from query string

Question

I using TYPO3 8.7 and extension tx_solr ver. 8.1 I try to get search result from builded query. For get results my method looks like

public function getSolrResults ()
{
        /** @var $searchInstance \ApacheSolrForTypo3\Solr\Search */
        $searchInstance = GeneralUtility::makeInstance(Search::class);

        $this->solrQuery->useRawQueryString(true);
        $this->solrQuery->useQueryString('*');
        $searchResponse = $searchInstance->search($this->solrQuery->getQuery());
        $parsedData = $searchResponse->getRawResponse();

        $responseAsArray = json_decode($parsedData, true);
        return $responseAsArray;
}

If I write string $this->solrQuery->useQueryString('*'), then I get full results. If I write $this->solrQuery->useQueryString('"my request string"'), then I don't have any result. But I'm sure that on query "my request string" solr server will find the results.

What's wrong here?

Answer 1

I got the result if I specify query field.

$this->solrQuery->useQueryString('title:request title')