Elastica\Type::getDocument PHP Method

    public function getDocument($id, $options = [])
    {
        $path = urlencode($id);
        $response = $this->request($path, Request::GET, [], $options);
        $result = $response->getData();
        if (!isset($result['found']) || $result['found'] === false) {
            throw new NotFoundException('doc id ' . $id . ' not found');
        }
        if (isset($result['fields'])) {
            $data = $result['fields'];
        } elseif (isset($result['_source'])) {
            $data = $result['_source'];
        } else {
            $data = [];
        }
        $document = new Document($id, $data, $this->getName(), $this->getIndex());
        $document->setVersion($result['_version']);
        return $document;
    }

 /**
  * @group functional
  */
 public function testSearchByDocument()
 {
     $client = $this->_getClient(array('persistent' => false));
     $index = $client->getIndex('elastica_test');
     $index->create(array('index' => array('number_of_shards' => 1, 'number_of_replicas' => 0)), true);
     $type = new Type($index, 'mlt_test');
     $type->addDocuments(array(new Document(1, array('visible' => true, 'name' => 'bruce wayne batman')), new Document(2, array('visible' => true, 'name' => 'bruce wayne')), new Document(3, array('visible' => false, 'name' => 'bruce wayne')), new Document(4, array('visible' => true, 'name' => 'batman')), new Document(5, array('visible' => false, 'name' => 'batman')), new Document(6, array('visible' => true, 'name' => 'superman')), new Document(7, array('visible' => true, 'name' => 'spiderman'))));
     $index->refresh();
     $doc = $type->getDocument(1);
     // Return all similar from id
     $mltQuery = new MoreLikeThis();
     $mltQuery->setMinTermFrequency(1);
     $mltQuery->setMinDocFrequency(1);
     $mltQuery->setLike($doc);
     $query = new Query($mltQuery);
     $resultSet = $type->search($query);
     $this->assertEquals(4, $resultSet->count());
     $mltQuery = new MoreLikeThis();
     $mltQuery->setMinTermFrequency(1);
     $mltQuery->setMinDocFrequency(1);
     $mltQuery->setLike($doc);
     $query = new Query\BoolQuery();
     $query->addMust($mltQuery);
     $this->hideDeprecated();
     // Return just the visible similar from id
     $filter = new Query\BoolQuery();
     $filterTerm = new Query\Term();
     $filterTerm->setTerm('visible', true);
     $filter->addMust($filterTerm);
     $query->addFilter($filter);
     $this->showDeprecated();
     $resultSet = $type->search($query);
     $this->assertEquals(2, $resultSet->count());
     // Return all similar from source
     $mltQuery = new MoreLikeThis();
     $mltQuery->setMinTermFrequency(1);
     $mltQuery->setMinDocFrequency(1);
     $mltQuery->setMinimumShouldMatch(90);
     $mltQuery->setLike($type->getDocument(1)->setId(''));
     $query = new Query($mltQuery);
     $resultSet = $type->search($query);
     $this->assertEquals(1, $resultSet->count());
     // Legacy test with filter
     $mltQuery = new MoreLikeThis();
     $mltQuery->setMinTermFrequency(1);
     $mltQuery->setMinDocFrequency(1);
     $mltQuery->setLike($doc);
     $query = new Query\BoolQuery();
     $query->addMust($mltQuery);
     $this->hideDeprecated();
     // Return just the visible similar
     $filter = new BoolFilter();
     $filterTerm = new Term();
     $filterTerm->setTerm('visible', true);
     $filter->addMust($filterTerm);
     $query->addFilter($filter);
     $this->showDeprecated();
     $resultSet = $type->search($query);
     $this->assertEquals(2, $resultSet->count());
 }