Elastica\Query::setVersion PHP 메소드

    public function setVersion($version = true)
    {
        return $this->setParam('version', $version);
    }

 public function findOneBy(ClassMetadata $class, $field, $value)
 {
     $filter = new Term(array($field => $value));
     $query = new Query(new Filtered(null, $filter));
     $query->setVersion(true);
     $query->setSize(1);
     $results = $this->search($query, array($class));
     if (!$results->count()) {
         throw new NoResultException();
     }
     return $results[0];
 }