基于自定义字段的 WooCommerce 产品变化价格

Question

我有可变产品，我添加了这样的自定义字段：

function ab_preorder_variation_fields( $loop, $variation_data, $variation ) {

    echo '<div class="options_group form-row form-row-full">';
    // Is Preordable
    woocommerce_wp_checkbox(
        array(
            'id'            => '_ab_preorder_checkbox[' . $variation->ID . ']',
            'wrapper_class' => 'show_if_simple',
            'label'         => __(' Disponible à la précommande', 'woocommerce' ),
            'description'   => __( 'Disponible à la précommande', 'woocommerce' ),
            'desc_tip'    => true,
            'value' => get_post_meta( $variation->ID, '_ab_preorder_checkbox', true )
        )
    );
    
    // Custom Preorder Price
    woocommerce_wp_text_input(
        array(
            'id'                => '_ab_preorder_custom_price[' . $variation->ID . ']',
            'label'             => __( 'Prix à la précommande', 'woocommerce' ),
            'placeholder'       => '',
            'desc_tip'          => true,
            'description'       => __( "Prix à la précommande", 'woocommerce' ),
            'type'              => 'number',
            'custom_attributes' => array(
                    'step'  => 'any',
                    'min'   => '0'
                ),
            'value' => get_post_meta( $variation->ID, '_ab_preorder_custom_price', true )
        )
    );
    // Date de livraison estimée
    woocommerce_wp_text_input(
        array(
            'id'          => '_ab_preorder_estimated_date[' . $variation->ID . ']',
            'label'       => __( 'Date de livraison estimé', 'woocommerce' ),
            'placeholder' => '24/09/2021',
            'desc_tip'    => true,
            'description' => __( "Date de livraison estimé", "woocommerce" ),
            'value' => get_post_meta( $variation->ID, '_ab_preorder_estimated_date', true )
        )
    );


    echo '</div>';

}
add_action( 'woocommerce_product_after_variable_attributes', 'ab_preorder_variation_fields', 10, 3 ); // After all Variation fields
function ab_preorder_variation_fields_saving( $post_id ){

    // Is Preordable
    $woocommerce_text_field = $_POST['_ab_preorder_checkbox'][ $post_id ];
    update_post_meta( $post_id, '_ab_preorder_checkbox', esc_attr( $woocommerce_text_field ) );
    
    // Custom Preorder Price
    $woocommerce_text_field = $_POST['_ab_preorder_custom_price'][ $post_id ];
    update_post_meta( $post_id, '_ab_preorder_custom_price', esc_attr( $woocommerce_text_field ) );
    
    // Date de livraison estimée
    $woocommerce_text_field = $_POST['_ab_preorder_estimated_date'][ $post_id ];
    update_post_meta( $post_id, '_ab_preorder_estimated_date', esc_attr( $woocommerce_text_field ) );

}

这是 WP Admin 中的结果：

这就是我想要做的： 当客户选择变体时，我想：如果变体库存数量为 0 并且选中 _ab_preorder_checkbox 复选框，我想将产品价格设置为 100。

我尝试使用下面的代码，但它不起作用：/

function action_woocommerce_before_calculate_totals( $cart_object) { 
    $cart_items = $cart_object->cart_contents;

      if ( ! empty( $cart_items ) ) {
        $price = 100;
        foreach ( $cart_items as $key => $value ) {
            if($value['data']['_ab_preorder_checkbox']=="yes")
            $value['data']->set_price( $price );
          
        }
      }

}; 
add_action( 'woocommerce_before_calculate_totals', 'action_woocommerce_before_calculate_totals', 10, 2 ); 

谁能帮我解决这个问题？

问候，

Answer 1

由于woocommerce不允许购买零库存产品，您需要为相关产品设置“允许延期交货”选项。

我重新审视了您的代码（特别是您的第二个函数）。

钩子woocommerce_before_calculate_totals 在您的情况下不方便。最好在产品上设置延期交货自定义价格。

启用复选框时，以下将设置变体的延期交货价格，并将其显示在相关变体上以及预计交货日期：

// Admin Variation custom fields
add_action( 'woocommerce_product_after_variable_attributes', 'ab_preorder_variation_fields', 10, 3 );
function ab_preorder_variation_fields( $loop, $variation_data, $variation ) {

    echo '<div class="options_group form-row form-row-full">';
    
    // Is Preordable
    woocommerce_wp_checkbox(
        array(
            'id'            => '_ab_preorder_checkbox['.$loop.']',
            'wrapper_class' => 'show_if_simple',
            'label'         => __(' Disponible à la précommande', 'woocommerce' ),
            'description'   => __( 'Disponible à la précommande', 'woocommerce' ),
            'desc_tip'    => true,
            'value' => get_post_meta( $variation->ID, '_ab_preorder_checkbox', true )
        )
    );

    // Custom Preorder Price
    woocommerce_wp_text_input(
        array(
            'id'                => '_ab_preorder_custom_price['.$loop.']',
            'label'             => __( 'Prix à la précommande', 'woocommerce' ),
            'placeholder'       => '',
            'desc_tip'          => true,
            'description'       => __( "Prix à la précommande", 'woocommerce' ),
            'type'              => 'number',
            'custom_attributes' => array(
                    'step'  => 'any',
                    'min'   => '0'
                ),
            'value' => get_post_meta( $variation->ID, '_ab_preorder_custom_price', true )
        )
    );

    // Date de livraison estimée
    woocommerce_wp_text_input(
        array(
            'id'          => '_ab_preorder_estimated_date['.$loop.']',
            'label'       => __( 'Date de livraison estimé', 'woocommerce' ),
            'desc_tip'    => true,
            'description' => __( "Date de livraison estimé", "woocommerce" ),
            'type'        => 'date',
            'value' => get_post_meta( $variation->ID, '_ab_preorder_estimated_date', true )
        )
    );

    echo '</div>';
}

// Save admin Variations custom fields values
add_action( 'woocommerce_admin_process_variation_object', 'ab_preorder_variation_fields_saving', 10, 2 );
function ab_preorder_variation_fields_saving( $variation, $loop ) {
    if( isset($_POST['_ab_preorder_checkbox'][$loop]) ) {
        $variation->update_meta_data( '_ab_preorder_checkbox', esc_attr($_POST['_ab_preorder_checkbox'][$loop]) );
    }

    if( isset($_POST['_ab_preorder_custom_price'][$loop]) ) {
        $variation->update_meta_data( '_ab_preorder_custom_price', esc_attr($_POST['_ab_preorder_custom_price'][$loop]) );
    }

    if( isset($_POST['_ab_preorder_estimated_date'][$loop]) ) {
        $variation->update_meta_data( '_ab_preorder_estimated_date', esc_attr($_POST['_ab_preorder_estimated_date'][$loop]) );
    }
}

// Set the variation backorder price
add_filter('woocommerce_product_variation_get_regular_price', 'custom_price', 99, 2 );
add_filter('woocommerce_product_variation_get_price', 'custom_price', 99, 2 );
function custom_price( $price, $product ) {
    if ( $product->get_stock_quantity() == 0 && $product->get_meta('_ab_preorder_checkbox') === 'yes' ) {
        $backorder_price = $product->get_meta('_ab_preorder_custom_price');
        
        if( $backorder_price > 0 ) {
            $price = (float) $backorder_price;
        }
    }
    return $price;
}

// Display prefixed backorder price and estimated delivery on single product pages
add_filter( 'woocommerce_available_variation', 'ab_available_variation_custom_field', 10, 3 );
function ab_available_variation_custom_field( $variation_data, $product, $variation ) {
    if ( $variation->get_stock_quantity() == 0 && $variation->get_meta('_ab_preorder_checkbox') === 'yes' ) {
        if ( $estimated_delivery_date = $variation->get_meta('_ab_preorder_estimated_date') ) {
            // Display estimated delivery date
            $variation_data['availability_html'] .= sprintf( '<p class="stock date-precommande">%s : %s</p>',
            __("Date de livraison estimée (précommande)", "woocommerce"), $estimated_delivery_date );
        }
        
        // Displayed prefixed formatted price
        $variation_data['price_html'] = '<span class="price-prefix">'.__("Prix à la précommande", "") .'<span> : ' . wc_price( $variation_data['display_price'] );
    }
    return $variation_data;
}

// Display on estimated delivery date on cart and checkout
add_filter( 'woocommerce_get_item_data', 'display_acf_on_cart_and_checkout', 10, 2 );
function display_acf_on_cart_and_checkout( $cart_data, $cart_item ) {
    if ( $cart_item['variation_id'] > 0 && $cart_item['data']->get_stock_quantity() == 0
    && $cart_item['data']->get_meta('_ab_preorder_checkbox') === 'yes' ) {
        if ( $estimated_delivery_date = $cart_item['data']->get_meta('_ab_preorder_estimated_date') ) {
            $custom_items[] = array( "name" => __("Date de livraison estimée", "woocommerce"),  "value" => $estimated_delivery_date );
        }
    }
    return $custom_items;
}

代码位于活动子主题（或活动主题）的functions.php 文件中。经过测试并且可以工作。