note 103798 deleted from mongocollection.update by danbrown

Note Submitter: eero at eero dot info ---- Quote from http://www.mongodb.org/display/DOCS/Updating Checking the Outcome of an Update Request As described above, a non-upsert update may or may not modify an existing object. An upsert will either modify an existing object or insert a new object. The client may determine if its most recent message on a connection updated an existing object by subsequently issuing a getlasterror command ( db.runCommand( "getlasterror" ) ). If the result of the getlasterror command contains an updatedExisting field, the last message on the connection was an update request. **If the updatedExisting field's value is true, that update request caused an existing object to be updated; if updatedExisting is false, no existing object was updated.** An "upserted" field will contain the new _id value if an insert is performed (new as of 1.5.4). So, if you execute update(), and returned array's updateExisting key's value is false, object was not updated.