예제 #1
0
 /**
  * Checks whether the given managed document exists in the database.
  *
  * @param object $document
  * @return boolean TRUE if the document exists in the database, FALSE otherwise.
  */
 public function exists($document)
 {
     $id = $this->class->getIdentifierObject($document);
     return (bool) $this->collection->findOne(array('_id' => $id), array('_id'));
 }