Magento 2:Überschreibt die Blockklasse – generiert keine Ausgabe

Question

Ich versuche, das zu überschreiben module-catalog/Block/Product/View/Options/Type/Select.php Klasse mit einer neuen Version, die ein paar andere Teile von benutzerdefiniertem PHP enthält (Hinzufügen von HTML-Klassen und IDs zu den enthaltenden DIVs).Ich versuche dies zu erreichen, indem ich ein neues Modul erstelle.Wenn dieses neue Modul aktiviert ist, werden die Auswahloptionen leider nicht auf der Produktseite gerendert.Der Rest der Seite ist in Ordnung, nur ohne die Auswahloptionen (Kontrollkästchen und Optionsfelder).Ich denke, alles sieht gut aus und sollte funktionieren, daher kann ich nicht verstehen, warum Select.php gibt die Auswahloptionen nicht zurück.

Verzeichnisaufbau:

app/
├── Mike/
│   ├── Newselect/
│   │   ├── Block/
│   │   │   ├── Product/
│   │   │   │   ├── View/
│   │   │   │   │   ├── Options/
│   │   │   │   │   │   ├── Type/
│   │   │   │   │   │   │   ├── Select.php
│   │   ├── etc/
│   │   │   ├── di.xml
│   │   │   ├── module.xml
│   │   ├── registration.php
│   │   ├── composer.json

di.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Catalog\Block\Product\View\Options\Type\Select" type="Mike\Newselect\Block\Product\View\Options\Type\Select" />
</config>

module.xml

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
        <module name="Mike_Newselect" setup_version="1.0.0"/>
</config>

registration.php

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'Mike_Newselect',
    __DIR__    
);

composer.json

{
    "name": "Mike/Newselect",
    "description": "Update the Select module to add HTML classes and IDs",
    "require": {
        "php": "~5.5.0|~5.6.0|~7.0.0",
        "magento/module-store": "100.0.*",
        "magento/module-eav": "100.0.*",
        "magento/module-cms": "100.0.*",
        "magento/module-indexer": "100.0.*",
        "magento/module-customer": "100.0.*",
        "magento/module-theme": "100.0.*",
        "magento/module-checkout": "100.0.*",
        "magento/module-backend": "100.0.*",
        "magento/module-widget": "100.0.*",
        "magento/module-wishlist": "100.0.*",
        "magento/module-tax": "100.0.*",
        "magento/module-msrp": "100.0.*",
        "magento/module-catalog-inventory": "100.0.*",
        "magento/module-directory": "100.0.*",
        "magento/module-catalog-rule": "100.0.*",
        "magento/module-product-alert": "100.0.*",
        "magento/module-url-rewrite": "100.0.*",
        "magento/module-catalog-url-rewrite": "100.0.*",
        "magento/module-page-cache": "100.0.*",
        "magento/module-quote": "100.0.*",
        "magento/module-config": "100.0.*",
        "magento/module-media-storage": "100.0.*",
        "magento/framework": "100.0.*",
        "magento/module-configurable-product": "100.0.*",
        "magento/module-ui": "100.0.*"
    },
    "suggest": {
        "magento/module-cookie": "100.0.*",
        "magento/module-catalog-sample-data": "Sample Data version:100.0.*"
    },
    "type": "magento2-module",
    "version": "100.0.5",
    "license": [
        "OSL-3.0",
        "AFL-3.0"
    ],
    "autoload": {
        "files": [
            "registration.php"
        ],
        "psr-4": {
            "Magento\\Catalog\\": ""
        }
    }
}

Select.php (Dies ist nur eine Kopie der Kerndatei Select.php – noch nicht aktualisiert – abgesehen vom Namespace und der Erweiterung der Kernklasse)

<?php
/**
 * Copyright © 2016 Magento. All rights reserved.
 * See COPYING.txt for license details.
 */

/**
 * Product options text type block
 *
 * @author     Magento Core Team <core@magentocommerce.com>
 */

namespace Mike\Newselect\Block\Product\View\Options\Type;

class Select extends \Magento\Catalog\Block\Product\View\Options\Type\Select
{
    /**
     * Return html for control element
     *
     * @return string
     * @SuppressWarnings(PHPMD.CyclomaticComplexity)
     * @SuppressWarnings(PHPMD.NPathComplexity)
     * @SuppressWarnings(PHPMD.ExcessiveMethodLength)
     */
    public function getValuesHtml()
    {
        $_option = $this->getOption();
        $configValue = $this->getProduct()->getPreconfiguredValues()->getData('options/' . $_option->getId());
        $store = $this->getProduct()->getStore();

        $this->setSkipJsReloadPrice(1);
        // Remove inline prototype onclick and onchange events

        if ($_option->getType() == \Magento\Catalog\Model\Product\Option::OPTION_TYPE_DROP_DOWN ||
            $_option->getType() == \Magento\Catalog\Model\Product\Option::OPTION_TYPE_MULTIPLE
        ) {
            $require = $_option->getIsRequire() ? ' required' : '';
            $extraParams = '';
            $select = $this->getLayout()->createBlock(
                'Magento\Framework\View\Element\Html\Select'
            )->setData(
                [
                    'id' => 'select_' . $_option->getId(),
                    'class' => $require . ' product-custom-option admin__control-select'
                ]
            );
            if ($_option->getType() == \Magento\Catalog\Model\Product\Option::OPTION_TYPE_DROP_DOWN) {
                $select->setName('options[' . $_option->getid() . ']')->addOption('', __('-- Please Select --'));
            } else {
                $select->setName('options[' . $_option->getid() . '][]');
                $select->setClass('multiselect admin__control-multiselect' . $require . ' product-custom-option');
            }
            foreach ($_option->getValues() as $_value) {
                $priceStr = $this->_formatPrice(
                    [
                        'is_percent' => $_value->getPriceType() == 'percent',
                        'pricing_value' => $_value->getPrice($_value->getPriceType() == 'percent'),
                    ],
                    false
                );
                $select->addOption(
                    $_value->getOptionTypeId(),
                    $_value->getTitle() . ' ' . strip_tags($priceStr) . '',
                    ['price' => $this->pricingHelper->currencyByStore($_value->getPrice(true), $store, false)]
                );
            }
            if ($_option->getType() == \Magento\Catalog\Model\Product\Option::OPTION_TYPE_MULTIPLE) {
                $extraParams = ' multiple="multiple"';
            }
            if (!$this->getSkipJsReloadPrice()) {
                $extraParams .= ' onchange="opConfig.reloadPrice()"';
            }
            $select->setExtraParams($extraParams);

            if ($configValue) {
                $select->setValue($configValue);
            }

            return $select->getHtml();
        }

        if ($_option->getType() == \Magento\Catalog\Model\Product\Option::OPTION_TYPE_RADIO ||
            $_option->getType() == \Magento\Catalog\Model\Product\Option::OPTION_TYPE_CHECKBOX
        ) {
            $selectHtml = '<div class="options-list nested" id="options-' . $_option->getId() . '-list">';
            $require = $_option->getIsRequire() ? ' required' : '';
            $arraySign = '';
            switch ($_option->getType()) {
                case \Magento\Catalog\Model\Product\Option::OPTION_TYPE_RADIO:
                    $type = 'radio';
                    $class = 'radio admin__control-radio';
                    if (!$_option->getIsRequire()) {
                        $selectHtml .= '<div class="field choice admin__field admin__field-option">' .
                            '<input type="radio" id="options_' .
                            $_option->getId() .
                            '" class="' .
                            $class .
                            ' product-custom-option" name="options[' .
                            $_option->getId() .
                            ']"' .
                            ($this->getSkipJsReloadPrice() ? '' : ' onclick="opConfig.reloadPrice()"') .
                            ' value="" checked="checked" /><label class="label admin__field-label" for="options_' .
                            $_option->getId() .
                            '"><span>' .
                            __('None') . '</span></label></div>';
                    }
                    break;
                case \Magento\Catalog\Model\Product\Option::OPTION_TYPE_CHECKBOX:
                    $type = 'checkbox';
                    $class = 'checkbox admin__control-checkbox';
                    $arraySign = '[]';
                    break;
            }
            $count = 1;
            foreach ($_option->getValues() as $_value) {
                $count++;

                $priceStr = $this->_formatPrice(
                    [
                        'is_percent' => $_value->getPriceType() == 'percent',
                        'pricing_value' => $_value->getPrice($_value->getPriceType() == 'percent'),
                    ]
                );

                $htmlValue = $_value->getOptionTypeId();
                if ($arraySign) {
                    $checked = is_array($configValue) && in_array($htmlValue, $configValue) ? 'checked' : '';
                } else {
                    $checked = $configValue == $htmlValue ? 'checked' : '';
                }

                $selectHtml .= '<div class="field choice admin__field admin__field-option' .
                    $require .
                    '">' .
                    '<input type="' .
                    $type .
                    '" class="' .
                    $class .
                    ' ' .
                    $require .
                    ' product-custom-option"' .
                    ($this->getSkipJsReloadPrice() ? '' : ' onclick="opConfig.reloadPrice()"') .
                    ' name="options[' .
                    $_option->getId() .
                    ']' .
                    $arraySign .
                    '" id="options_' .
                    $_option->getId() .
                    '_' .
                    $count .
                    '" value="' .
                    $htmlValue .
                    '" ' .
                    $checked .
                    ' price="' .
                    $this->pricingHelper->currencyByStore($_value->getPrice(true), $store, false) .
                    '" />' .
                    '<label class="label admin__field-label" for="options_' .
                    $_option->getId() .
                    '_' .
                    $count .
                    '"><span>' .
                    $_value->getTitle() .
                    '</span> ' .
                    $priceStr .
                    '</label>';
                $selectHtml .= '</div>';
            }
            $selectHtml .= '</div>';

            return $selectHtml;
        }
    }
}

catalog_product_view.xml

<block class="Magento\Catalog\Block\Product\View\Options\Type\Select" as="select" template="product/view/options/type/select.phtml"/>

Answer 1

Erstens, Wir müssen unserer benutzerdefinierten Auswahlklasse die Konstruktor-Injektionsmethode hinzufügen: (Bearbeiten:Wir müssen keine Konstruktorinjektion hinzufügen, sondern das Sequenzmodul)

    <?php
    namespace Mike\Newselect\Block\Product\View\Options\Type;

    class Select extends \Magento\Catalog\Block\Product\View\Options\Type\Select
    {
        public function __construct(
            \Magento\Framework\View\Element\Template\Context $context,
            \Magento\Framework\Pricing\Helper\Data $pricingHelper,
            \Magento\Catalog\Helper\Data $catalogData,
            array $data = []
        )
        {
            parent::__construct($context, $pricingHelper, $catalogData, $data);
        }
        .....

Wir müssen Folgendes hinzufügen:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
        <module name="Mike_Newselect" setup_version="1.0.0">
            <sequence>
                <module name="Magento_Catalog"/>
            </sequence>
        </module>
</config>

http://devdocs.magento.com/guides/v2.1/extension-dev-guide/build/module-load-order.html

Zweitens: Kopieren vendor/magento/module-catalog/view/frontend/templates/product/view/options/type/select.phtml zu unserem benutzerdefinierten Modul app/code/Mike/Newselect/view/frontend/templates/product/view/options/type/select.phtml