CollectionModify::arrayAppend

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CollectionModify::arrayAppend — Append element to an array field

说明

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

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.

范例

Example #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());
?>

以上例程的输出类似于：

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