Сохранение и отображение пользовательских метаданных элемента заказа в Woocommerce

У меня какой-то пользовательский код работал отлично, и так как я обновил Woocommerce до версии 3.5.2, он больше не работает, не уверен, что это потому, что я изменил тему WordPress или потому, что плагин обновляется.

Моя проблема в том, что значение настраиваемых полей не отображается на странице заказа в woocommerce или даже в электронном письме заказа.

Вот соответствующий код:

// 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'] );
}
}

Я искал часы и понятия не имею, как ее решить или в чем проблема. Любая помощь или советы будут действительно полезны. Большое спасибо.