Session: How to Get Entity Change-Vector

• The change-vector reflects the cluster-wide point in time in which a change occured, and includes the unique database ID, node identifier, and document Etag in the specific node.

• When a document is downloaded from the server, it contains various metadata information.
  E.g. ID or current change-vector.

• The current change-vector is stored within the session metadata and is available for each entity using the getChangeVectorFor method from the advanced session operations.

Syntax

public function getChangeVectorFor(?object $instance): ?string;

Example

$employee = $session->load(Employee::class, "employees/1-A");
$changeVector = $session->advanced()->getChangeVectorFor($employee);