MongoDB\Driver\Manager::executeCommand
(mongodb >=1.0.0)
MongoDB\Driver\Manager::executeCommand — Execute a database command
Описание
$db
, MongoDB\Driver\Command $command
[, MongoDB\Driver\ReadPreference $readPreference
] )
Executes command on a server If
readPreference is provided, it will be used for server
selection; otherwise, the default read preference will be used.
Список параметров
-
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.
Возвращаемые значения
Returns MongoDB\Driver\Cursor on success.
Ошибки
- Throws MongoDB\Driver\Exception\InvalidArgumentException on argument parsing errors.
- Throws MongoDB\Driver\Exception\ConnectionException if connection to the server fails (for reasons other than authentication).
- Throws MongoDB\Driver\Exception\AuthenticationException if authentication is needed and fails.
- Throws MongoDB\Driver\Exception\RuntimeException on other errors (e.g. invalid command, issuing a write command to a secondary).
Примеры
Пример #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);
?>
Результат выполнения данного примера:
array(1) {
["ok"]=>
float(1)
}
Пример #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);
}
?>
Результат выполнения данного примера:
object(stdClass)#6 (2) {
["_id"]=>
string(3) "bar"
["sum"]=>
int(10)
}
object(stdClass)#7 (2) {
["_id"]=>
string(3) "foo"
["sum"]=>
int(2)
}
Примечания
Замечание:
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.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.
Смотрите также
- MongoDB\Driver\Command
- MongoDB\Driver\Cursor
- MongoDB\Driver\ReadPreference
- MongoDB\Driver\Server::executeCommand() - Execute a database command on this server
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