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(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
readPreference
parameter 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
command
document 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.