(mongodb >=1.0.0)
MongoDB\Driver\Manager::executeCommand — Execute a database command
$db
, MongoDB\Driver\Command $command
[, array $options = array()
] ) : MongoDB\Driver\CursorSelects a server according to the "readPreference" option and executes the command on that server. By default, the read preference from the MongoDB Connection URI will be used.
This method applies no special logic to the command. Although this method accepts "readConcern" and "writeConcern" options, which will be incorporated into the command document, those options will not default to corresponding values from the MongoDB Connection URI nor will the MongoDB server version be taken into account. Users are therefore encouraged to use specific read and/or write command methods if possible.
db (string)El nombre de la base de datos en la que ejecutar el comando.
command (MongoDB\Driver\Command)El comando a ejecutar.
options
| Option | Type | Description |
|---|---|---|
| readConcern | MongoDB\Driver\ReadConcern |
Un asunto de escritura a aplicar a la operación. Esta opción está disponible en MongoDB 3.2+ y resultará en una excepción en tiempo de ejecución si es especificada para una versión de servidor más antigua. |
| readPreference | MongoDB\Driver\ReadPreference |
Una preferencia de lectura a usar para seleccionar un servidor para la operación. |
| session | MongoDB\Driver\Session |
Una sesión a asociar con la operación. |
| writeConcern | MongoDB\Driver\WriteConcern |
Un asunto de escritura a aplicar a la operación. |
Si se usa la opción "session" con sesión que tenga una transacción en progreso, no se puede especificar una opción "readConcern" o "writeConcern". Esto resultarña en una MongoDB\Driver\Exception\InvalidArgumentException. En su lugar se debería establecer estas dos opciones al crear la transacción con MongoDB\Driver\Session::startTransaction().
Devuelve un MongoDB\Driver\Cursor en caso de éxito.
| Versión | Descripción |
|---|---|
| 1.4.4 | MongoDB\Driver\Exception\InvalidArgumentException will be thrown if the "session" option is used in combination with an unacknowledged write concern. |
| 1.4.0 |
The third parameter is now an options array.
For backwards compatibility, this paramater will still accept a
MongoDB\Driver\ReadPreference object.
|
Ejemplo #1 MongoDB\Driver\Manager::executeCommand() with a command returning a single result document
<?php
$manager = new MongoDB\Driver\Manager('mongodb://localhost:27017');
$command = new MongoDB\Driver\Command(['ping' => 1]);
try {
$cursor = $manager->executeCommand('admin', $command);
} catch(MongoDB\Driver\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}
/* The ping command returns a single result document, so we need to access the
* first result in the cursor. */
$response = $cursor->toArray()[0];
var_dump($response);
?>
El resultado del ejemplo sería:
array(1) {
["ok"]=>
float(1)
}
Ejemplo #2 MongoDB\Driver\Manager::executeCommand() with a command returning a cursor
<?php
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");
$bulk = new MongoDB\Driver\BulkWrite;
$bulk->insert(['x' => 1, 'y' => 'foo']);
$bulk->insert(['x' => 2, 'y' => 'bar']);
$bulk->insert(['x' => 3, 'y' => 'bar']);
$manager->executeBulkWrite('db.collection', $bulk);
$command = new MongoDB\Driver\Command([
'aggregate' => 'collection',
'pipeline' => [
['$group' => ['_id' => '$y', 'sum' => ['$sum' => '$x']]],
],
'cursor' => new stdClass,
]);
$cursor = $manager->executeCommand('db', $command);
/* The aggregate command can optionally return its results in a cursor instead
* of a single result document. In this case, we can iterate on the cursor
* directly to access those results. */
foreach ($cursor as $document) {
var_dump($document);
}
?>
El resultado del ejemplo sería:
object(stdClass)#6 (2) {
["_id"]=>
string(3) "bar"
["sum"]=>
int(10)
}
object(stdClass)#7 (2) {
["_id"]=>
string(3) "foo"
["sum"]=>
int(2)
}
Ejemplo #3 Limiting execution time for a command
The execution time of a command may be limited by specifying a value for "maxTimeMS" in the MongoDB\Driver\Command document. Note that this time limit is enforced on the server side and does not take network latency into account. See » Terminate Running Operations in the MongoDB manual for more information.
<?php
$manager = new MongoDB\Driver\Manager('mongodb://localhost:27017');
$command = new MongoDB\Driver\Command([
'count' => 'collection',
'query' => ['x' => ['$gt' => 1]],
'maxTimeMS' => 1000,
]);
$cursor = $manager->executeCommand('db', $command);
var_dump($cursor->toArray()[0]);
?>
If the command fails to complete after one second of execution time on the server, a MongoDB\Driver\Exception\ExecutionTimeoutException will be thrown.
Nota: If a secondary
readPreferenceis used, it is the caller's responsibility to ensure that thecommandcan be executed on a secondary. No validation is done by the driver.