在 Woocommerce 中保存并显示订单项自定义元数据

我有一些自定义代码工作得很好，自从我将 Woocommerce 更新到版本 3.5.2 后，它就不再工作了，不确定是因为我更改了 WordPress 主题还是因为插件更新了。

我的问题是自定义字段的值不会出现在 woocommerce 的订单页面上，甚至不会出现在订单电子邮件上。

这是相关代码：

// Display Fields using WooCommerce Action Hook
 add_action('woocommerce_product_options_general_product_data', 'woocom_general_product_data_custom_field');
function woocom_general_product_data_custom_field()
{
    // FieldName1
    woocommerce_wp_text_input(array('id' => 'FieldName1', 'label' => __('FieldName1', 'woocommerce'), 'placeholder' => '', 'desc_tip' => 'false', 'description' => __('', 'woocommerce')));

    // FieldType1
    woocommerce_wp_text_input(array('id' => 'FieldType1', 'label' => __('FieldType1', 'woocommerce'), 'placeholder' => '', 'desc_tip' => 'false', 'description' => __('', 'woocommerce')));

    // FieldLenght1
    woocommerce_wp_text_input(array('id' => 'FieldLenght1', 'label' => __('FieldLenght1', 'woocommerce'), 'placeholder' => '', 'desc_tip' => 'false', 'description' => __('', 'woocommerce')));

    // Dropdown1
    woocommerce_wp_text_input(array('id' => 'Dropdown1', 'label' => __('Dropdown1', 'woocommerce'), 'placeholder' => '', 'desc_tip' => 'false', 'description' => __('', 'woocommerce')));       
}

// Hook to save the data value from the custom fields
add_action('woocommerce_process_product_meta', 'woocom_save_general_proddata_custom_field');
function woocom_save_general_proddata_custom_field($post_id)
{
    // Save Label Option 1
    update_post_meta($post_id, 'FieldName1', esc_attr($_POST['FieldName1']));

     // Save Label Option 1
    update_post_meta($post_id, 'FieldType1', esc_attr($_POST['FieldType1']));

    // Save Label Option 1
    update_post_meta($post_id, 'FieldLenght1', esc_attr($_POST['FieldLenght1']));

    // Save Dropdown1
    update_post_meta($post_id, 'Dropdown1', esc_attr($_POST['Dropdown1']));
}

/**
 * Register the 'Custom Column' column in the importer.
 *
 * @param array $options
 * @return array $options
 */
function add_column_to_importer($options)
{

    // column slug => column name
    $options['FieldName1'] = 'FieldName1';
    $options['FieldType1'] = 'FieldType1';
    $options['FieldLenght1'] = 'FieldLenght1';
    $options['Dropdown1'] = 'Dropdown1';

    return $options;
}
add_filter('woocommerce_csv_product_import_mapping_options', 'add_column_to_importer');

/**
 * Process the data read from the CSV file.
 * This just saves the value in meta data, but you can do anything you want here with the data.
 *
 * @param WC_Product $object - Product being imported or updated.
 * @param array $data - CSV data read for the product.
 * @return WC_Product $object
 */
function process_import( $object, $data ) {


    if ( ! empty( $data['FieldName1'] ) ) {
        $object->update_meta_data( 'FieldName1', $data['FieldName1'] );
    }
    if ( ! empty( $data['FieldType1'] ) ) {
        $object->update_meta_data( 'FieldType1', $data['FieldType1'] );
    }
    if ( ! empty( $data['FieldLenght1'] ) ) {
        $object->update_meta_data( 'FieldLenght1', $data['FieldLenght1'] );
    }
    if ( ! empty( $data['Dropdown1'] ) ) {
        $object->update_meta_data( 'Dropdown1', $data['Dropdown1'] );
    }

    return $object;
}
add_filter( 'woocommerce_product_import_pre_insert_product_object', 'process_import', 10, 2 );

// Add the field to the product
add_action('woocommerce_before_add_to_cart_button', 'my_custom_checkout_field');
function my_custom_checkout_field() {
    global $product;

    $product_id = $product->get_id();

    // Get the field name of InputText1
    $FieldType1 = get_post_meta($product_id, 'FieldType1', true);
    $FieldName1 = get_post_meta($product_id, 'FieldName1', true);
    $FieldLenght1 = get_post_meta($product_id, 'FieldLenght1', true);
    $Dropdown1 = get_post_meta($product_id, 'Dropdown1', true);
    $Dropdown1Content = explode(", ", $Dropdown1);

    echo '<table class="extravariations" cellspacing="0">
                        <tbody>';
    // Field 1

    if( ! empty( $FieldType1 ) ){
        if( $FieldType1 == "TEXT AREA"){

            echo '

                    <tr>
                        <td class="label">
                            <label for="'.$FieldName1.'" id="label1">'.$FieldName1.':</label><br> 
                        </td>
                        <td class="value">
                            <textarea id="'.$FieldName1.'" class="inputfield1" name="FieldTypeValue1" maxlength="'.$FieldLenght1.'" rows="2" cols="80" placeholder="" required></textarea>
                        </td>                       
                    </tr>';
        }

        if( $FieldType1 == "TEXT BOX"){
        echo '<tr>
                        <td class="label">
                            <label for="'.$FieldName1.'" id="label1">'.$FieldName1.':</label>
                        </td>
                        <td class="value">
                            <input  id="'.$FieldName1.'" class="inputfield1" type="text"  maxlength="'.$FieldLenght1.'" name="FieldTypeValue1" value="" required>
                        </td>                       
                    </tr>';
        }


        if( $FieldType1 == "DROP DOWN"){


             echo ' <tr>
                            <td class="label">
                                <label for="'.$FieldName1.'" id="label1">'.$FieldName1.':</label>
                            </td>
                            <td class="value">';
            echo'<select id="'.$FieldName1.'" class="inputfield1"             name="FieldTypeValue1" >';
                                foreach ($Dropdown1Content as $Dropdown1IndividualContent) {
                                echo '<option     value="'.$Dropdown1IndividualContent.'">';
                                echo $Dropdown1IndividualContent;
                                echo '</option>';
                                }
            echo'</td></tr>';

        }

    }

    echo'               </tbody>
            </table>';
}

// Store custom field label and value in cart item data
add_action( 'woocommerce_add_cart_item_data','save_my_custom_checkout_field', 20, 2 );
function save_my_custom_checkout_field( $cart_item_data, $product_id ) {
    $label1 = get_post_meta( $product_id, 'FieldName1', true );

    if( isset( $_REQUEST['FieldTypeValue1'] ) && ! empty( $label1 ) )
        $cart_item_data['custom_data']['1'] = array(
            'label' => $label1,
            'value' => sanitize_text_field( $_REQUEST['FieldTypeValue1'] ),
        );


    if( count($cart_item_data['custom_data']) > 0 )
        $cart_item_data['custom_data']['key'] = md5( microtime().rand() );

    return $cart_item_data;
}


// Display items custom fields label and value in cart and checkout pages
add_filter( 'woocommerce_get_item_data', 'render_meta_on_cart_and_checkout', 20, 2 );
function render_meta_on_cart_and_checkout( $cart_data, $cart_item ){
    $custom_items = array();

    if( !empty( $cart_data ) )
        $custom_items = $cart_data;

    if( isset( $cart_item['custom_data'] ) ) {
        foreach( $cart_item['custom_data'] as $key => $custom_data ){
            if( $key != 'key' ){
                $custom_items[] = array(
                    'name' => $custom_data['label'],
                    'value' => $custom_data['value'],
                );
            }
        }

    }
    return $custom_items;
}

// Save item custom fields label and value as order item meta data
add_action('woocommerce_add_order_item_meta','save_in_order_item_meta', 10, 3 );
function save_in_order_item_meta( $item_id, $values, $cart_item_key ) {
    if( isset( $values['custom_data'] ) ) {
        wc_add_order_item_meta( $item_id, $values['custom_data']['label'], $values['custom_data']['value'] );
    }
}

我已经寻找了几个小时，但我不知道如何解决它或问题是什么。任何帮助或提示都会非常有帮助。多谢。

第一个主要问题是$cart_item_data['custom_data']['1'] = array(那应该是：

$cart_item_data['custom_data'] = array(
    'label' => $label1,
    'value' => sanitize_text_field( $_REQUEST['FieldTypeValue1'] ),
);

那么第二个主要问题是最后一个函数，其中woocommerce_get_item_data已过时并被替换woocommerce_checkout_create_order_line_item已经回答了在你的最后一个问题中 https://stackoverflow.com/questions/53697569/problem-with-woocommerce-add-order-item-meta.

因此，下面我重新审视了您的最后 3 个功能：

// Store custom field label and value in cart item data
add_action( 'woocommerce_add_cart_item_data','add_custom_data_as_custom_cart_item_data', 10, 3 );
function add_custom_data_as_custom_cart_item_data( $cart_item_data, $product_id, $variation_id ) {
    if( isset( $_REQUEST['FieldTypeValue1'] ) ) {

        // Get an instance of the WC_Product object
        $product = wc_get_product( $variation_id > 0 ? $variation_id : $product_id );

        if( $label = $product->get_meta('FieldName1') ){
            $cart_item_data['custom_data'] = array(
                'label' => $product->get_meta('FieldName1'),
                'value' => sanitize_text_field( $_REQUEST['FieldTypeValue1'] ),
                'unique_key' => md5( microtime().rand() ),
            );
        }
    }
    return $cart_item_data;
}

// Display cart item custom data in cart and checkout pages
add_filter( 'woocommerce_get_item_data', 'display_cart_item_custom_on_cart_and_checkout', 10, 2 );
function display_cart_item_custom_on_cart_and_checkout( $cart_item_data, $cart_item ){
    if( isset($cart_item['custom_data']['label']) && isset($cart_item['custom_data']['value']) ) {
        $cart_item_data[] = array(
            'name' => $cart_item['custom_data']['label'],
            'value' => $cart_item['custom_data']['value'],
        );
    }
    return $cart_item_data;
}

// Save cart item custom data as order item meta data and display it everywhere in Orders and email notifications
add_action('woocommerce_checkout_create_order_line_item', 'save_custom_order_item_meta_data', 10, 4 );
function save_custom_order_item_meta_data( $item, $cart_item_key, $values, $order ) {
    if( isset( $values['custom_data']['label'] ) && isset( $values['custom_data']['value'] ) ) {
       $item->update_meta_data( $values['custom_data']['label'], $values['custom_data']['value'] );
    }
}

代码位于活动子主题（或活动主题）的 function.php 文件中。经过测试并工作。