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CollectionModify::limit — Limit number of modified documents
Limit the number of documents modified by this operation. Optionally combine with skip() to define an offset value.
rows
The maximum number of documents to modify.
A CollectionModify object.
示例 #1 mysql_xdevapi\CollectionModify::limit() example
<?php
$session = mysql_xdevapi\getSession("mysqlx://user:password@localhost");
$session->sql("DROP DATABASE IF EXISTS addressbook")->execute();
$session->sql("CREATE DATABASE addressbook")->execute();
$schema = $session->getSchema("addressbook");
$collection = $schema->createCollection("people");
$collection->add('{"name": "Fred", "age": 21, "job": "Construction"}')->execute();
$collection->add('{"name": "Wilma", "age": 23, "job": "Teacher"}')->execute();
$collection->add('{"name": "Betty", "age": 24, "job": "Teacher"}')->execute();
$collection
->modify("job = :job")
->bind(['job' => 'Teacher'])
->set('job', 'Principal')
->limit(1)
->execute();
$result = $collection
->find()
->execute();
print_r($result->fetchAll());
?>
以上示例的输出类似于:
Array ( [0] => Array ( [_id] => 00005b6b53610000000000000118 [age] => 21 [job] => Construction [name] => Fred ) [1] => Array ( [_id] => 00005b6b53610000000000000119 [age] => 23 [job] => Principal [name] => Wilma ) [2] => Array ( [_id] => 00005b6b5361000000000000011a [age] => 24 [job] => Teacher [name] => Betty ) )