WooCommerce 自定义结帐复选框字段验证一个必填复选框

Question

我有三个自定义结帐字段，人们必须至少检查一个才能通过订单。 这仅适用于 1 个产品。

因此，我遍历购物车项目以检查产品是否在购物车中，然后添加字段。这部分工作正常：

add_action( 'woocommerce_before_order_notes', 'mmm_add_custom_checkout_field' );

function mmm_add_custom_checkout_field( $checkout ) { 
    
       $product_id = 214884;
   $in_cart = false;
  
   foreach( WC()->cart->get_cart() as $cart_item ) {
      $product_in_cart = $cart_item['product_id'];
      if ( $product_in_cart === $product_id ) $in_cart = true;
   }
  
   if ( $in_cart ) {
    echo '<h2>Membership Application</h2>';
    echo '<p>Select all that applies</p>';
   woocommerce_form_field( 'read_wog', array(        
      'type' => 'checkbox',        
      'class' => array( 'form-row-wide no-req' ), 
       'required' => true,
      'label' => 'I accept term 1', 
   ), $checkout->get_value( 'read_wog' ) ); 
        woocommerce_form_field( 'one_on_one', array(        
      'type' => 'checkbox',        
      'class' => array( 'form-row-wide no-req' ),
      'required' => true,
      'label' => 'I accept term 2', 
   ), $checkout->get_value( 'one_on_one' ) ); 
        woocommerce_form_field( 'mm_sn', array(        
      'type' => 'checkbox',
      'required' => true,
      'class' => array( 'form-row-wide no-req' ),        
      'label' => 'I accept term 3).', 
   ), $checkout->get_value( 'mm_sn' ) ); 

      
  
   }

}

该网站使用 Paypal Express 作为支付网关，无论复选框是否验证，验证都允许人们通过 Paypal。默认字段的验证工作正常。但是手动刷新页面时会添加错误提示！

验证码如下：

add_action( 'woocommerce_checkout_process', 'mmm_validate_new_checkout_field' );
  
function mmm_validate_new_checkout_field() {    
   $product_id = 214884;
   $in_cart = false;
  
   foreach( WC()->cart->get_cart() as $cart_item ) {
      $product_in_cart = $cart_item['product_id'];
      if ( $product_in_cart === $product_id ) $in_cart = true;
   }
     if( $in_cart && !isset($_POST['mm_sn']) && !isset($_POST['one_on_one']) && !isset($_POST['read_wog']) ) {
         wc_add_notice( 'You can only have a full membership if you accept at least 1 term', 'error' );
     }
}

知道如何让它工作吗？

Answer 1

“该网站使用 PayPal Express 作为支付网关”

这不够具体，无法提供建议。如果正在使用 PayPal JS SDK 按钮（在 WooCommerce PayPal 插件配置中称为智能按钮），那么您可以添加一个 onClick 处理程序，如下所述：https://developer.paypal.com/docs/business/javascript-sdk/javascript-sdk-reference/#oninitonclick

您需要编辑 WooCommerce 插件如何调用 paypal.Buttons 的输出 JS 以包含这样的功能。

Answer 2

如果在结帐时至少有一个复选框未被选中，则以下重新访问的代码将引发错误验证消息：

// Custom function that check if a specific product is in cart
function is_product_in_cart( $product_id ) {
    foreach( WC()->cart->get_cart() as $item ) {
        if ( in_array( $product_id, array($item['product_id'], $item['variation_id']) ) ) {
            return true;
        }
    }
    return false;
}

// Add Custom checkout checkboxes fields
add_action( 'woocommerce_before_order_notes', 'mmm_add_custom_checkout_field' );
function mmm_add_custom_checkout_field( $checkout ) {
    $targeted_id = 214884;

    if ( is_product_in_cart( $targeted_id ) ) {
        echo '<h2>Membership Application</h2>
            <p>Select all that applies</p>';
        
        woocommerce_form_field( 'read_wog', array(
            'type' => 'checkbox',
            'class' => array( 'form-row-wide no-req' ),
            'required' => true,
            'label' => 'I accept term 1',
        ), $checkout->get_value( 'read_wog' ) );
        
        woocommerce_form_field( 'one_on_one', array(
            'type' => 'checkbox',
            'class' => array( 'form-row-wide no-req' ),
            'required' => true,
            'label' => 'I accept term 2',
        ), $checkout->get_value( 'one_on_one' ) );
        
        woocommerce_form_field( 'mm_sn', array(
            'type' => 'checkbox',
            'required' => true,
            'class' => array( 'form-row-wide no-req' ),
            'label' => 'I accept term 3).',
        ), $checkout->get_value( 'mm_sn' ) );
    }
}

// Custom checkout checkboxes fields validation
add_action( 'woocommerce_checkout_process', 'mmm_validate_new_checkout_field' );
function mmm_validate_new_checkout_field() {
    $targeted_id = 214884;

    if ( is_product_in_cart( $targeted_id ) && ! ( isset($_POST['read_wog']) || isset($_POST['one_on_one']) || isset($_POST['mm_sn']) ) ) {
        wc_add_notice( 'You can only have a full membership if you accept at least 1 term', 'error' );
    }
}

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。