(mongodb >=1.0.0)
MongoDB\Driver\Server::executeCommand — Execute a database command on this server
$db
, MongoDB\Driver\Command $command
[, MongoDB\Driver\ReadPreference $readPreference
] )
Executes command on this server.
Note:
The
readPreferenceparameter does not control the server to which the driver issues the command; the command will always be executed on this server object. Instead, it may be used when issuing the command to a secondary (from a replica set connection, not standalone) or mongos node to ensure that the driver sets the wire protocol accordingly or adds the read preference to the command document, respectively.
db (string)The name of the database on which to execute the command.
command (MongoDB\Driver\Command)The MongoDB\Driver\Command to execute.
readPreference (MongoDB\Driver\ReadPreference)Optionally, a MongoDB\Driver\ReadPreference to select the server for this operation. If none is given, the read preference from the MongoDB Connection URI will be used.
Returns MongoDB\Driver\Cursor on success.
Note:
This method does not take a MongoDB\Driver\WriteConcern parameter. For write commands (e.g. » findAndModify in MongoDB 3.2+), the write concern should be included in the
commanddocument itself.It is the caller's responsibility to ensure that the server is capable of executing the command. For example, executing a write operation on a secondary (excluding its "local" database) will fail.