Magento 2：使用色板获取可配置产品中的简单产品ID和数量

本文显示了如何从Magento 2.x的前端产品详细信息页面中的可配置产品中获取关联的简单产品ID和数量（数量）/库存。

–以下代码假定产品详细信息页面中已使用色板。
–假设您的可配置产品有两个可配置的属性（颜色和尺寸）。
–单击任何颜色样本，然后单击尺寸样本：
–然后，将显示该特定颜色和尺寸相关产品的可用库存数量。

您可以在此文件的开头添加以下代码Javascript和PHP：app / design / frontend / Theme_Namespace / Theme_Name / Magento_Catalog / templates / product / view / addtocart.phtml。

这是完整的代码：

<script type="text/javascript">
requirejs(['jquery','underscore'], function(jQuery,_){
    jQuery(window).load(function(){
        jQuery( ".product-options-wrapper div" ).click(function() {
            selpro();
        });
    });
    function selpro () {
        var selected_options = {};
        jQuery('div.swatch-attribute').each(function(k,v){
            var attribute_id    = jQuery(v).attr('attribute-id');
            var option_selected = jQuery(v).attr('option-selected');
            //console.log(attribute_id, option_selected);
            if(!attribute_id || !option_selected){ return;}
            selected_options[attribute_id] = option_selected;
        });
 
        var product_id_index = jQuery('[data-role=swatch-options]').data('mageSwatchRenderer').options.jsonConfig.index;
        var found_ids = [];
        //console.log(product_id_index);
        jQuery.each(product_id_index, function(product_id,attributes){
            //console.log(product_id);
            var productIsSelected = function(attributes, selected_options){
                return _.isEqual(attributes, selected_options);
            }
            if(productIsSelected(attributes, selected_options)){
                found_ids.push(product_id);
            } 
        });
        
        //console.log(found_ids);
 
        if (found_ids.length) {
            var selected_product_id = found_ids[0];
            jQuery('.myli').css('display','none');
            jQuery('#div'+selected_product_id).toggle();
        }
    }
});
</script>    

<?php 
    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $product = $objectManager->get('Magento\Framework\Registry')->registry('current_product');//get current product
    $productTypeInstance = $product->getTypeInstance();
    if ($product->getTypeId() == \Magento\ConfigurableProduct\Model\Product\Type\Configurable::TYPE_CODE) {
        $usedProducts = $productTypeInstance->getUsedProducts($product);
?>
        <ul>
            <?php foreach ($usedProducts  as $child) { ?>
                <li class="myli" id="div<?php echo $child->getId()?>" style="display:none;list-style:none">
                    <?php 
                    $productStockObj = $objectManager->get('Magento\CatalogInventory\Api\StockRegistryInterface')->getStockItem($child->getId());
                    echo "We have ".round($productStockObj->getData('qty'))." items in stock!";
                    ?>
                </li>
            <?php } ?>
        </ul> 
<?php 
    } else {
        $productStockObj = $objectManager->get('Magento\CatalogInventory\Api\StockRegistryInterface')->getStockItem($product->getId());
        echo "We have ".round($productStockObj->getData('qty'))." items in stock!";
    }
?>