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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);| Parameters | ||
|---|---|---|
| instance | T | Instance of an entity for which an Etag will be returned. |
| Return Value | |
|---|---|
| string | Returns the current change-vector for an entity. Throws an exception if the instance is not tracked by the session. |
Employee employee = session.Load<Employee>("employees/1-A");
string changeVector = session.Advanced.GetChangeVectorFor(employee);Dear User,
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