Collection::getOne

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Collection::getOne — Get one document

说明

public mysql_xdevapi\Collection::getOne(string $id): Document

Fetches one document from the collection.

This is a shortcut for: Collection.find("_id = :id").bind("id", id).execute().fetchOne();

参数

id: The document _id in the collection.

返回值

The collection object, or null if the _id does not match a document.

范例

示例 #1 mysql_xdevapi\Collection::getOne() 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");

$result = $collection->add('{"name": "Alfred", "age": 42, "job": "Butler"}')->execute();

// A unique _id is (by default, and recommended) generated by MySQL Server
// This retrieves the generated _id's; only one in this example, so $ids[0]
$ids        = $result->getGeneratedIds();
$alfreds_id = $ids[0];

// ...

print_r($alfreds_id);
print_r($collection->getOne($alfreds_id));
?>

以上例程的输出类似于：

00005b6b536100000000000000b1

Array
(
    [_id] => 00005b6b536100000000000000b1
    [age] => 42
    [job] => Butler
    [name] => Alfred
)