Elastica\Query\QueryString::setQuery PHP 메소드

    public function setQuery($query = '')
    {
        if (!is_string($query)) {
            throw new InvalidException('Parameter has to be a string');
        }
        return $this->setParam('query', $query);
    }

 public function search($searchString, $maxNbResponses)
 {
     $searchQuery = new QueryString();
     $searchQuery->setQuery($searchString)->setFields(array('nom'));
     $repository = $this->searchService->getRepository('StanhomeRhBundle:Customer');
     return $repository->find($searchQuery, $maxNbResponses);
 }