filter() public method

Filter DSL.
public filter ( ) : Query
return Elastica\QueryBuilder\DSL\Query
 /**
  * Perform the show action for a block
  *
  * @param ReadBlockInterface $block
  *
  * @return Response
  */
 public function show(ReadBlockInterface $block)
 {
     $request = $this->requestStack->getCurrentRequest();
     $data = $request->get('elastica_search');
     $searchData = array();
     if (is_array($data) && array_key_exists('search', $data) && null !== $data['search']) {
         $searchParameter = $data['search'];
         $index = $this->client->getIndex($this->indexName);
         $qb = new QueryBuilder();
         $search = new Search($this->client);
         $search->addIndex($index);
         $search->setQuery($qb->query()->filtered($qb->query()->query_string($searchParameter), $qb->filter()->bool()->addMust($qb->filter()->term(array('language' => $request->getLocale())))));
         $searchData = $search->search(null, array('limit' => $block->getAttribute('searchLimit')));
     }
     return $this->render('OpenOrchestraElasticaFrontBundle:Block/List:show.html.twig', array('searchData' => $searchData));
 }
 /**
  * @group unit
  */
 public function testFacade()
 {
     $qb = new QueryBuilder();
     // test one example QueryBuilder flow for each default DSL type
     $this->assertInstanceOf('Elastica\\Query\\AbstractQuery', $qb->query()->match());
     $this->assertInstanceOf('Elastica\\Filter\\AbstractFilter', $qb->filter()->bool());
     $this->assertInstanceOf('Elastica\\Aggregation\\AbstractAggregation', $qb->aggregation()->avg('name'));
     $this->assertInstanceOf('Elastica\\Suggest\\AbstractSuggest', $qb->suggest()->term('name', 'field'));
 }