CollectionModify::arrayInsert

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CollectionModify::arrayInsert — Insert element into an array field

Beschreibung

public mysql_xdevapi\CollectionModify::arrayInsert ( 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 arrayAppend(), arrayInsert() allows you to specify where the new element is inserted by defining which item it is after, whereas arrayAppend() always appends the new element at the end of the array.

Parameter-Liste

collection_field

Identify the item in the array that the new element is inserted after. The format of this parameter is FIELD_NAME[ INDEX ] where FIELD_NAME is the name of the document field to remove the element from, and INDEX is the INDEX of the element within the field.

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

expression_or_literal

The new element to insert after FIELD_NAME[ INDEX ]

Rückgabewerte

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

Beispiele

Beispiel #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());
?>

Das oben gezeigte Beispiel erzeugt eine ähnliche Ausgabe wie:

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