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CollectionModify::arrayInsert

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CollectionModify::arrayInsertInsert element into an array field

说明

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

Adds an element to a document's field, as multiple elements of a field are represented as an array. Unlike mysql_xdevapi\CollectionModify::arrayAppend() this method allows to specify where the new element is inserted by defining which item it is after, whereas mysql_xdevapi\CollectionModify::arrayAppend() always appends the new element at the end of the array.

参数

collection_field

Identifies the item in the array after which the new element will be inserted. The format of this parameter is FIELD_NAME[ INDEX ] where FIELD_NAME is the name of the document field to add the element to, and INDEX is the INDEX of the element within the field.

The INDEX field is zero based, so the first item of the array has an index of 0.

expression_or_literal

The new element to insert after FIELD_NAME[ INDEX ]

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::arrayInsert() 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')")
->
arrayInsert('traits[1]', 'Happy')
->
execute();

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

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

以上示例的输出类似于:

Array
(
    [0] => Array
        (
            [_id] => 00005b6b5361000000000000010d
            [name] => Bernie
            [traits] => Array
                (
                    [0] => Friend
                    [1] => Happy
                    [2] => Brother
                    [3] => Human
                )
        )
)
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