WooCommerce 条件自定义结帐字段

WooCommerce conditional custom checkout fields

在 WooCommerce 中,我目前正在尝试在 Checkout 中添加一个条件自定义字段,该字段显示一个复选框,如果选中该复选框,则会显示一个输入字段以插入意大利财政代码 (Codice Fiscale)。

多亏了各种指南和插件代码,我才能够在结帐时显示它,但我对代码做了一些错误并遇到了几个问题:

  1. 默认情况下,我希望它是非必填字段,只有当它被选中时它才必须成为必填字段。
  2. 如果我尝试继续购物车插入有效或非 codice fiscale,我会收到此错误 "SyntaxError: Unexpected token < in JSON at position 0" 我的主题通常显示结帐错误。
  3. 仅以意大利语显示所有这些内容(使用 WPML)
  4. 我无法解决前两点,我无法知道更多错误。

注意:意大利法律规定,如果私人客户要求开具发票,他还必须填写他的(有效)"codice fiscale" (财政代码)

为避免复杂化,我没有插入任何高级检查工具(那将需要更多字段,例如生日)。相反,我通过模式标签设置了这个短控件:

jQuery('#cf_in').prop('pattern', "^[a-zA-Z]{6}[0-9]{2}[a-zA-Z][0-9]{2}[a-zA-Z][0-9]{3}[a-zA-Z]$");

我在网上找到了它,但不知道它是否有效。我也有这个:

function isCodiceFiscaleValid($valore,$codice_fiscale = true){
    $espressione = "^[a-z]{6}[0-9]{2}[a-z][0-9]{2}[a-z][0-9]{3}[a-z]$";
    if(!$codice_fiscale){
        $espressione = "^[0-9]{11}$";
    }
    if ( eregi($espressione, $valore) )
    {
        return true;
    }
    return false;
}

核对后,插入的"Codice fiscale"(fiscal code)没问题,我们就可以进行结帐,给客户和管理员展示这个"codice fiscale" .

我还需要使用 WooCommerce PDF Invoices & Packing Slips Pro 插件 (商业版) 将其打印在 PDF 发票上。

这里引用(可惜只能post2):

这里是代码 (添加到我的主题的 functions.php 文件中):

add_filter( 'woocommerce_checkout_fields' , 'cbi_cf_chkbox' );

function cbi_cf_chkbox ( $fields ) {
    if ( ICL_LANGUAGE_CODE=='it' )
    $fields['billing']['checkbox_trigger'] = array(
    'type'      => 'checkbox',
    'label'     => __('Voui la fattura? (solo per privati)', 'cbi-custom-parts'),
    'class'     => array('form-row-wide'),
    'clear'     => true
     ); 

    $fields['billing']['cf_in'] = array(
    'label'     => __('Inserisci il codice fiscale', 'cbi-custom-parts'),
    'placeholder'   => _x('RSSMRA85T10A562S', 'placeholder', 'cbi-custom-parts'),
    'class'     => array('display-none form-row-wide'),
    'clear'     => true
     );
    return $fields;
}

add_action( 'woocommerce_after_checkout_form', 'cbi_cf_conditionally_hide_show', 6);

function cbi_cf_conditionally_hide_show() {
   if ( ICL_LANGUAGE_CODE=='it' )
  ?>
    <script type="text/javascript">
        jQuery('input#checkbox_trigger').change(function(){           
            if (this.checked) {
                jQuery('#cf_in_field').fadeIn();
                jQuery('#cf_in_field').attr('required', true);
                jQuery('#cf_in').prop('pattern', "^[a-zA-Z]{6}[0-9]{2}[a-zA-Z][0-9]{2}[a-zA-Z][0-9]{3}[a-zA-Z]$");
            } else {
                jQuery('#cf_in_field').fadeOut();
                jQuery('#cf_in_field input').val('');
                jQuery('#cf_in_field').attr('required', false);
            }
        });
    </script>
    <?php
}
function isCodiceFiscaleValid($valore,$codice_fiscale = true){
    $espressione = "^[a-z]{6}[0-9]{2}[a-z][0-9]{2}[a-z][0-9]{3}[a-z]$";
    if(!$codice_fiscale){
        $espressione = "^[0-9]{11}$";
    }
    if ( eregi($espressione, $valore) )
    {
        return true;
    }
    return false;
}

/*
 * This method processes fields of checkout form
 */
add_action('woocommerce_checkout_process', 'cbi_cf_process');
function cbi_cf_process() {
    if (! empty($_POST['cf_in']) ){
        $valid_codice_fiscale = isCodiceFiscaleValid($_POST['cf_in'],true);

        if( (!$valid_codice_fiscale) ){
            wc_add_notice( 'Wrong data in Codice Fiscale/Partita Iva field', 'error' );
        }
    }
}

/*
 * This method saves codice fiscale data in order meta and in user meta
 */
add_action( 'woocommerce_checkout_update_order_meta', 'cbi_cf_in_update_order_meta' );
function cbi_cf_in_update_order_meta ( $order_id ) {
    if ( ! empty( $_POST['cf_in'] ) ) {
        update_post_meta( $order_id, 'cf_in', sanitize_text_field( $_POST['cf_in'] ) );
        $order = new WC_Order($order_id);
        update_user_meta($order->user_id, 'cf_in', sanitize_text_field( $_POST['cf_in'] ) );
    }
}

/*
 * This method shows the value of Partita Iva field after billing address
 */
add_action( 'woocommerce_admin_order_data_after_billing_address', 'cbi_cf_admin_order_data_after_billing_address', 10, 1 );
function cbi_cf_admin_order_data_after_billing_address($order){
    echo '<p><strong>'.__('Codice Fiscale', 'cbi-cf-invoice').':</strong> ' . get_post_meta( $order->id, 'cf_in', true ) . '</p>';
}

如果你能在这里帮助我,我将不胜感激。

在这个回答中我无法处理 PDF 发票,所以你会得到这里:

  • 解决条件"required"字段的问题(第1点)
  • 解决错误的问题(第2点)
  • 仅针对意大利语显示(第 3 点)

另外我还有:

  • 重新访问了您的所有代码并更正了许多小错误。
  • 添加了显示和编辑后端用户个人资料自定义字段值的代码"codice fiscale":

代码如下:

add_filter( 'woocommerce_checkout_fields' , 'cbi_cf_chkbox' );
function cbi_cf_chkbox ( $fields ) {
    if ( ICL_LANGUAGE_CODE !='it' ) return $fields; // Only for Italy

    $fields['billing']['checkbox_cf'] = array(
        'type'      => 'checkbox',
        'label'     => __('Voui la fattura? (solo per privati)', 'cbi-custom-parts'),
        'class'     => array('form-row-wide'),
        'clear'     => true
     );

    $fields['billing']['cf_in'] = array(
        'label'     => __('Inserisci il codice fiscale', 'cbi-custom-parts'),
        'placeholder'   => _x('RSSMRA85T10A562S', 'placeholder', 'cbi-custom-parts'),
        'class'     => array('form-row-wide'),
        'clear'     => true
     );

    return $fields;
}

add_action( 'woocommerce_after_checkout_form', 'cbi_cf_conditionally_hide_show', 6);
function cbi_cf_conditionally_hide_show() {
    if ( ICL_LANGUAGE_CODE !='it' ) return; // Only for Italy
    $required = esc_attr__( 'required', 'woocommerce' );
    ?>
    <script type="text/javascript">
        (function($){
            var required = '<abbr class="required" title="<?php echo $required; ?>">*</abbr>'; // Required html

            $('#cf_in_field > #cf_in').prop('pattern', "^[a-zA-Z]{6}[0-9]{2}[a-zA-Z][0-9]{2}[a-zA-Z][0-9]{3}[a-zA-Z]$"); // Doesn't seem to do something
            $('#cf_in_field').hide();

            $('input#checkbox_cf').change(function(){
                if (this.checked) {
                    $('#cf_in_field').fadeIn("fast", function(){
                        $(this).addClass("validate-required");
                        $('#cf_in_field > label').append(required);
                    });
                } else {
                    $('#cf_in_field').fadeOut("fast", function(){
                        $(this).removeClass("validate-required");
                        $('#cf_in_field > label > .required').remove();
                    });
                }
                $('#cf_in_field').val('');
                $('#cf_in_field').removeClass("woocommerce-validated");
                $('#cf_in_field').removeClass("woocommerce-invalid woocommerce-invalid-required-field");
            });
        })(jQuery);
    </script>
    <?php
}

// Utility function checking "codice fiscale" validity
function is_cf_valid( $valore, $codice_fiscale = true ){
    $espressione = "^[a-z]{6}[0-9]{2}[a-z][0-9]{2}[a-z][0-9]{3}[a-z]$";
    if( ! $codice_fiscale ) $espressione = "^[0-9]{11}$";
    return eregi( $espressione, $valore ) ? true : false;
}

// Check custom fields value "codice fiscale" when submit and return error notices (if needed)
add_action('woocommerce_checkout_process', 'cbi_cf_process');
function cbi_cf_process() {
    if ( isset($_POST['checkbox_cf']) && $_POST['checkbox_cf'] == 1 ) {
        if( empty( $_POST['cf_in'] ) ) {
            wc_add_notice( __( "Please don't forget to enter your Codice Fiscale/Partita Iva", "cbi-custom-parts" ), "error" );
        } else {
            $valid_codice_fiscale = is_cf_valid( $_POST['cf_in'] );
            if( ( ! $valid_codice_fiscale ) )
                wc_add_notice( __( "Wrong data in Codice Fiscale/Partita Iva field", "cbi-custom-parts" ), "error" );
        }
    }
}

// Save the custom field value "codice fiscale" in order meta and in user meta
add_action( 'woocommerce_checkout_update_order_meta', 'cbi_cf_in_update_order_meta' );
function cbi_cf_in_update_order_meta ( $order_id ) {
    if ( empty( $_POST['cf_in'] ) ) return;

    $customer_id = get_post_meta( $order_id, '_customer_user', true );
    $user_codice_fiscale = get_user_meta( $order_id, 'codice_fiscale', true );

    if( ! empty( $user_codice_fiscale ) )
        update_user_meta($order->user_id, 'codice_fiscale', sanitize_text_field( $_POST['cf_in'] ) );

    update_post_meta( $order_id, '_codice_fiscale', sanitize_text_field( $_POST['cf_in'] ) );
}

// Backend : Display in Order edit pages, after billing address, the custom field value "codice fiscale"
add_action( 'woocommerce_admin_order_data_after_billing_address', 'cbi_cf_admin_order_data_after_billing_address', 10, 1 );
function cbi_cf_admin_order_data_after_billing_address( $order ){
    $codice_fiscale = get_post_meta( $order->get_id(), '_codice_fiscale', true );
    if( ! empty( $codice_fiscale ) )
        echo '<p><strong>'.__('Codice Fiscale', 'cbi-cf-invoice').':</strong> ' . $codice_fiscale . '</p>';
}

// Backend: Display and edit user profile custom field value "codice fiscale" Only for Italy
add_action( 'show_user_profile', 'add_extra_user_codice_fiscale', 1, 1 );
add_action( 'edit_user_profile', 'add_extra_user_codice_fiscale', 1, 1 );
function add_extra_user_codice_fiscale( $user )
{

    //if( get_user_meta( $user->ID, 'billing_country', true ) != 'IT' ) return;  // Only for Italy
    $codice_fiscale = get_user_meta( $user->ID, 'codice_fiscale', true );
    if( empty( $codice_fiscale ) ) $codice_fiscale = '';
    ?>
        <h3><?php _e( "Codice fiscale", "cbi-custom-parts" ); ?></h3>
        <table class="form-table"><tr>
            <th><label for="codice_fiscale"><?php _e( "Codice fiscale", "cbi-custom-parts" ); ?></label></th>
            <td><input type="text" name="codice_fiscale" value="<?php echo esc_attr($codice_fiscale); ?>" class="regular-text" /></td>
        </tr></table><br />
    <?php
}

// Backend: Save edited user profile custom field value "codice fiscale" Only for Italy
add_action( 'personal_options_update', 'save_extra_user_codice_fiscale' );
add_action( 'edit_user_profile_update', 'save_extra_user_codice_fiscale' );
function save_extra_user_codice_fiscale( $user_id )
{
    if( ! empty( $_POST['codice_fiscale'] ) )
        update_user_meta( $user_id, 'codice_fiscale', sanitize_text_field( $_POST['codice_fiscale'] ) );
}

代码进入您的活动子主题(或主题)的 function.php 文件或任何插件文件。

所有代码都在 Woocommerce 3+ 上测试并且有效。