MongoCommandCursor::createFromDocument
(PECL mongo >=1.5.0)
MongoCommandCursor::createFromDocument — Create a new command cursor from an existing cursor document
Description
$connection
, string $hash
, array $document
)Use this method if you have a raw command result with cursor information in it.
Parameters
-
connection -
Database connection.
-
hash -
The connection has, as obtained through the third by-reference argument to MongoDB:command().
-
document -
Document with cursor information in it. This document needs to contain the id, ns and firstBatch fields. Such a document is obtained by calling the MongoDB:command() with appropriate arguments to return a cursor, and not just a result. See the example below.
Return Values
Returns the new cursor.
Examples
Example #1 MongoCommandCursor::createFromDocument()
<?php
$m = new MongoClient;
$d = $m->demo;
// setup the pipeline
$pipeline = [
[ '$group' => [
'_id' => '$country_code',
'timezones' => [ '$addToSet' => '$timezone' ]
] ],
[ '$sort' => [ '_id' => 1 ] ],
];
// run the command. The "cursor" option below instructs the server to return a cursor information document instead of results
$r = $d->command(
[
'aggregate' => 'cities',
'pipeline' => $pipeline,
'cursor' => [ 'batchSize' => 1 ],
],
null,
$hash
);
// Show result and hash
var_dump( $r, $hash );
// construct the command cursor
$cursor = MongoCommandCursor::createFromDocument( $m, $hash, $r );
?>
The above example will output something similar to:
array(2) {
["cursor"]=>
array(3) {
["id"]=>
object(MongoInt64)#5 (1) {
["value"]=>
string(12) "392143983421"
}
["ns"]=>
string(11) "demo.cities"
["firstBatch"]=>
array(1) {
[0]=>
array(2) {
["_id"]=>
string(2) "AD"
["timezones"]=>
array(1) {
[0]=>
string(14) "Europe/Andorra"
}
}
}
}
["ok"]=>
float(1)
}
string(25) "localhost:27017;-;.;17617"
As you can see, the returned cursor information has the id, ns and firstBatch fields.
- PHP Руководство
- Функции по категориям
- Индекс функций
- Справочник функций
- Расширения для работы с базами данных
- Расширения для работы с базами данных отдельных производителей
- MongoDB
- Базовые классы
- MongoCommandCursor::batchSize
- MongoCommandCursor::__construct
- MongoCommandCursor::createFromDocument
- MongoCommandCursor::current
- MongoCommandCursor::dead
- MongoCommandCursor::getReadPreference
- MongoCommandCursor::info
- MongoCommandCursor::key
- MongoCommandCursor::next
- MongoCommandCursor::rewind
- MongoCommandCursor::setReadPreference
- MongoCommandCursor::timeout
- MongoCommandCursor::valid
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