CollectionModify::arrayAppend

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CollectionModify::arrayAppendAppend element to an array field

说明

public mysql_xdevapi\CollectionModify::arrayAppend(string $collection_field, string $expression_or_literal): mysql_xdevapi\CollectionModify

Add an element to a document's field, as multiple elements of a field are represented as an array. Unlike arrayInsert(), arrayAppend() always appends the new element at the end of the array, whereas arrayInsert() can define the location.

参数

collection_field

The identifier of the field where the new element is inserted.

expression_or_literal

The new element to insert at the end of the document field array.

返回值

A CollectionModify object that can be used to execute the command, or to add additional operations.

示例

示例 #1 mysql_xdevapi\CollectionModify::arrayAppend() 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": "Bernie",
"traits": ["Friend", "Brother", "Human"]}'
)
->
execute();

$collection
->modify("name in ('Bernie', 'Jane')")
->
arrayAppend('traits', 'Happy')
->
execute();

$result = $collection
->find()
->
execute();

print_r($result->fetchAll());
?>

以上示例的输出类似于:

Array
(
    [0] => Array
        (
            [_id] => 00005b6b5361000000000000010c
            [name] => Bernie
            [traits] => Array
                (
                    [0] => Friend
                    [1] => Brother
                    [2] => Human
                    [3] => Happy
                )
        )
)
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