/**
* Checks whether the given managed entity exists in the database.
*
* @param object $entity
* @return bool
*/
public function exists($entity)
{
$metadata = $this->getMetadata($entity);
$identifier = $metadata->getIdentifier(true);
if (empty($identifier)) {
return false;
}
return (bool) $this->connection->fetchColumn('SELECT 1 FROM ' . $metadata->getTable() . ' WHERE ' . $identifier . '=' . $this->connection->quote($metadata->getValue($entity, $identifier, true)));
}