You are currently browsing legacy 4.1 version of documentation. Click here to switch to the newest 5.0 version.
Session: How to Get Entity Change-Vector
The change-vector reflects the cluster wide point in time where something happened. It includes the unique database ID, node identifier, and the Etag of the document in the specific node.
When a document is downloaded from the server, it contains various metadata information e.g. ID or current change-vector. Current change-vector is stored within the metadata in session and is available for each entity using the
GetChangeVectorFor method from the
Advanced session operations.
string GetChangeVectorFor<T>(T instance);
|instance||T||Instance of an entity for which an Etag will be returned.|
|string||Returns the current change-vector for an entity. Throws an exception if the
Employee employee = session.Load<Employee>("employees/1-A"); string changeVector = session.Advanced.GetChangeVectorFor(employee);