(mongodb >=1.0.0)
MongoDB\Driver\Command::__construct — Create a new Command
$document
[, array $commandOptions
] )Constructs a new MongoDB\Driver\Command, which is an immutable value object that represents a database command. The command may then be executed with MongoDB\Driver\Manager::executeCommand().
The complete command document, which includes the command name and its
options, should be expressed in the document
parameter. The commandOptions parameter is only used
to specify options related to the execution of the command and the resulting
MongoDB\Driver\Cursor.
documentThe complete command document, which will be sent to the server.
commandOptionsNote: Do not use this parameter to specify options described in the command's reference in the MongoDB manual. This parameter should only be used for the options explicitly listed below.
| Option | Type | Description |
|---|---|---|
| maxAwaitTimeMS | integer |
Positive integer denoting the time limit in milliseconds for the server to block a getMore operation if no data is available. This option should only be used in conjunction with commands that return a tailable cursor (e.g. » Change Streams). |
| 版本 | 说明 |
|---|---|
| 1.4.0 |
Added a second |
Example #1 MongoDB\Driver\Command::__construct() example
<?php
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");
$command = new MongoDB\Driver\Command(array("buildinfo" => 1));
try {
$cursor = $manager->executeCommand("admin", $command);
$response = $cursor->toArray()[0];
} catch(MongoDB\Driver\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}
var_dump($response);
?>
以上例程的输出类似于：
array(13) {
["version"]=>
string(14) "2.8.0-rc2-pre-"
["gitVersion"]=>
string(62) "b743d7158f7642f4da6b7eac8320374b3b88dc2e modules: subscription"
["OpenSSLVersion"]=>
string(25) "OpenSSL 1.0.1f 6 Jan 2014"
["sysInfo"]=>
string(104) "Linux infant 3.16.0-24-generic #32-Ubuntu SMP Tue Oct 28 13:07:32 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49"
["loaderFlags"]=>
string(91) "-fPIC -pthread -Wl,-z,now -rdynamic -Wl,-Bsymbolic-functions -Wl,-z,relro -Wl,-z,now -Wl,-E"
["compilerFlags"]=>
string(301) "-Wnon-virtual-dtor -Woverloaded-virtual -std=c++11 -fPIC -fno-strict-aliasing -ggdb -pthread -Wall -Wsign-compare -Wno-unknown-pragmas -Winvalid-pch -pipe -Werror -O3 -Wno-unused-local-typedefs -Wno-unused-function -Wno-deprecated-declarations -Wno-unused-but-set-variable -fno-builtin-memcmp -std=c99"
["allocator"]=>
string(8) "tcmalloc"
["versionArray"]=>
array(4) {
[0]=>
int(2)
[1]=>
int(8)
[2]=>
int(0)
[3]=>
int(-8)
}
["javascriptEngine"]=>
string(2) "V8"
["bits"]=>
int(64)
["debug"]=>
bool(false)
["maxBsonObjectSize"]=>
int(16777216)
["ok"]=>
float(1)
}
Example #2 MongoDB\Driver\Command::__construct() example
Commands can accept options as well, as part of the normal structure that you create to send to the server. For example, the maxTimeMS option can be passed with most commands to restrict the amount of time a specific command can run for on the server.
<?php
$manager = new MongoDB\Driver\Manager("mongodb://localhost:27017");
$command = new MongoDB\Driver\Command(
array(
"distinct" => "beer",
"key" => "beer_name",
"maxTimeMS" => 10,
)
);
try {
$cursor = $manager->executeCommand("beerdb", $command);
$response = $cursor->toArray()[0];
} catch(MongoDB\Driver\Exception\Exception $e) {
echo $e->getMessage(), "\n";
exit;
}
var_dump($response);
?>
以上例程的输出类似于：