getLastError( <w>, <wtimeout> )
Changed in version 2.6: A new protocol for write operations integrates write concerns with the write operations, eliminating the need for a separate
db.getLastError(). Most write methods now return the status of the write operation, including error information. In previous versions, clients typically used the
db.getLastError()in combination with a write operation to verify that the write succeeded.
db.getLastError()can accept the following parameters:
Parameter Type Description
int or string Optional. The write concern’s
int Optional. The time limit in milliseconds.
error string provides error information on the previous write operation.
The following example issues a
db.getLastError() operation that verifies that the preceding write operation, issued over the same connection, has propagated to at least two members of the replica set.