magento2中的数组管理器

2年前

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作者：晓风拂月

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数组管理器

概述

Magento\Framework\Stdlib\ArrayManager库提供了管理深度嵌套关联数组的功能。该库主要用于处理来自DataProviders和Modifier中UI组件的数据，这实际上是解析关联数组中XML文件的复杂过程的一部分。

用法

METHOD	DESCRIPTION
`exists`	Checks if the node exists in a given associative array
`find`	Finds a node in a nested array and saves its index and parent node reference
`findPaths`	Gets matching paths for elements with specified indexes.
`get`	Returns the value of the key (or node) at the end of the path. `null` is returned if the node could not be found.
`move`	Moves a value from one path to another
`merge`	Merges a value with a node and returns the modified data.
`populate`	Populates a nested array, if possible and necessary.
`remove`	Removes a node and returns the modified array.
`replace`	Updates the existing nodes and returns the modified array
`set`	Sets the value into a node and returns modified data.
`slicePath`	Retrieves a slice of the specified path.

例1

下面的示例演示如何使用LayoutProcessor实现将自定义字段添加到签出账单地址。

<?php
/**
 * Process js Layout of block
 *
 * @param array $jsLayout
 *
 * @return array
 */
public function process($jsLayout)
{
    ...

    if (isset($jsLayout['components']['checkout']['children']['steps']['children']['shipping-step']
        ['children']['shippingAddress']['children']['shipping-address-fieldset']['children'])
    ) {
        $fields = $jsLayout['components']['checkout']['children']['steps']['children']['shipping-step']
        ['children']['shippingAddress']['children']['shipping-address-fieldset']['children'];

        ...
    }

    ...
}

为了更清晰地实现上一个示例，请使用Magento\Framework\Stdlib\ArrayManager库消除重复检查并获取所需的数组。

<?php

use Magento\Framework\Stdlib\ArrayManager;

...
    /**
     * @var ArrayManager
     */
    private $arrayManager;

    /**
     * SomeClass constructor.
     *
     * @param ArrayManager $arrayManager
     */
    public function __construct(ArrayManager $arrayManager)
    {
        $this->arrayManager = $arrayManager;
    }

    /**
     * Process js Layout of block
     *
     * @param array $jsLayout
     *
     * @return array
     */
    public function process($jsLayout): array
    {
        $path = 'components/checkout/children/steps/children/shipping-step/children/shippingAddress/children/shipping-address-fieldset/children';

        if ($fields = $this->arrayManager->get($path, $jsLayout)) {
            ...
        }

        ...
    }

...
示例二：
假设您有以下嵌套数组：
$data = [
    'response' => [
        'status' => 'OK',
        'result' => [
            'items' => [
                0 => 'First item',
                1 => 'Second item',
                ...
            ],
            ...
        ]
    ]
]



...

您可以使用Magento\Framework\Stdlib\ArrayManager库访问数组中的项：

...



if ($this->arrayManager->get('response/status', $data) === 'OK') {

    $items = $this->arrayManager->get('response/result/items', $data) ?? [];



    foreach ($items as $item) {

        ...

    }

}

您可以使用Magento\Framework\Stdlib\ArrayManager库从给定路径填充数组：

...

$this->arrayManager->populate('response/result/items', $data)

...

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