Woocommerce 3中的可编辑管理员自定义计费字段错误问题

问题是未定义$theorder并且您不能在其上使用get_id()方法.

The problem is that $theorder is not defined and you can't use get_id() method on it.

但是代码中的主要问题首先来自您的结帐帐单字段.应该按照设置，显示和保存它们(特别注意保存数据时要使用的meta_keys)

But the main problem in your code comes from your checkout billing fields first. They should be set, displayed and saved as follow (taking a particular care of the meta_keys to be used when data is saved):

// Frontend: Display the custom billing fields (in checkout and my account)
add_filter( 'woocommerce_billing_fields' ,'add_custom_billing_fields', 20, 1 );
function add_custom_billing_fields( $fields ) {

    $fields['billing_address_3'] = array(
        'label' => __( 'Home', 'woocommerce' ),
        'placeholder'   => _x('Fill in your Home', 'placeholder', 'woocommerce'),
        'required'  => true,
        'class'     => array('form-row-wide'),
        'clear'     => true
    );

    $fields['billing_address_4'] = array(
        'label' => __( 'Entrance', 'woocommerce' ),
        'placeholder'   => _x('Fill in your Entrance', 'placeholder', 'woocommerce'),
        'required'  => true,
        'class'     => array('form-row-wide'),
        'clear'     => true
    );

    $fields['billing_address_5'] = array(
        'label' => __( 'Floor', 'woocommerce' ),
        'placeholder'   => _x('Fill in your Floor', 'placeholder', 'woocommerce'),
        'required'  => true,
        'class'     => array('form-row-wide'),
        'clear'     => true
    );

    return $fields;
}

// Save the custom billing fields (once order is placed)
add_action( 'woocommerce_checkout_create_order', 'save_custom_billingt_fields', 20, 2 );
function save_custom_billingt_fields( $order, $data ) {
    if ( isset( $_POST['billing_address_3'] ) && ! empty( $_POST['billing_address_3'] ) ) {
        $order->update_meta_data('_billing_address_3', sanitize_text_field( $_POST['billing_address_3'] ) );
        update_user_meta( $order->get_customer_id(), 'billing_address_3', sanitize_text_field( $_POST['billing_address_3'] ) );
    }
    if ( isset( $_POST['billing_address_4'] ) && ! empty( $_POST['billing_address_4'] ) ) {
        $order->update_meta_data('_billing_address_4', sanitize_text_field( $_POST['billing_address_4'] ) );
        update_user_meta( $order->get_customer_id(), 'billing_address_4', sanitize_text_field( $_POST['billing_address_4'] ) );
    }
    if ( isset( $_POST['billing_address_5'] ) && ! empty( $_POST['billing_address_5'] ) ) {
        $order->update_meta_data('_billing_address_5', sanitize_text_field( $_POST['billing_address_5'] ) );
        update_user_meta( $order->get_customer_id(), 'billing_address_5', sanitize_text_field( $_POST['billing_address_5'] ) );
    }
}

您将看到这些自定义字段也在我的帐户">地址">编辑帐单地址"中.并且所有相关的都是自动同步.无需其他验证或保存代码...

You will see that those custom fields are also in My account > addresses > Edit billing address. And everything related is auto sync. No need of additional validation or saving code...

现在在管理订单页面中，对于woocommerce_admin_billing_fields管理员挂钩，'value'键在字段数组中不存在，这是有罪的.

Now in admin order pages, for woocommerce_admin_billing_fields admin hook, the 'value' key doesn't exist in the field array and it is the guilty.

由于已正确设置并保存了自定义结帐字段，因此不需要任何'value'数组键，因为数据将自动填充(如果存在).因此您的代码将是:

As you have correctly set and saved your custom checkout fields, you don't need any 'value' array key, as the data will be auto populated, if it exist. So your code will be:

// Backend: Display editable custom billing fields
add_filter( 'woocommerce_admin_billing_fields' , 'order_admin_custom_fields' );
function order_admin_custom_fields( $fields ) {
    global $the_order;

    $fields['address_3'] = array(
        'label' => __( 'Home', 'woocommerce' ),
        'show'  => true,
        'wrapper_class' => 'form-field-wide',
        'style' => '',
    );

    $fields['address_4'] = array(
        'label' => __( 'Entrance', 'woocommerce' ),
        'show'  => true,
        'wrapper_class' => 'form-field-wide',
        'style' => '',
    );

    $fields['address_5'] = array(
        'label' => __( 'Floor', 'woocommerce' ),
        'show'  => true,
        'wrapper_class' => 'form-field-wide',
        'style' => '',
    );

    return $fields;
}

代码进入您的活动子主题(或活动主题)的function.php文件中.经过测试，可以正常工作.

Code goes in function.php file of your active child theme (or active theme). Tested and works.

该错误现在已经消失

The error is now definitively gone