如何计算 WooCommerce 编辑订单中的自定义订单总额？

Question

目前，我正在开发 WooCommerce (5.2.2) 项目。我的客户希望在后端（不适用于客户）为预付款创建一个自定义输入字段，以便当我的客户收到客户的预付款（交货目的）时，他们可以手动添加并从后端订购总计自动调整。因此，我编写了代码并在帖子元表中创建了一个自定义字段，并使用该元表值来计算总订单，它可以工作，但我必须刷新两次才能获取订单的总新值。这是我的代码并告诉我如何修复它 -

add_action( 'manage_shop_order_posts_custom_column' ,  array(&$this,'add_custom_column_content'), 11, 2 );

add_action( 'woocommerce_admin_order_totals_after_discount', array(&$this, 'vp_add_sub_total'), 10, 1);

add_action( 'woocommerce_process_shop_order_meta', array(&$this, 'save_order_custom_field_meta_data'), 12, 2 );


// Output a custom editable field in backend edit order pages under general section
         function editable_order_custom_field( $order ){            
        
            // Get "Delivery Type" from meta data (not item meta data)
            $updated_advance_payment = $order->get_meta('_advance_payment');
        
            // Replace "Delivery Type" value by the meta data if it exist
            $advancePayment = $updated_advance_payment ? $updated_advance_payment : ( isset($item_value) ? $item_value : '');
        
            // Display the custom editable field
            woocommerce_wp_text_input( 
                array(
                    'id'            => 'advance_payment',
                    'label'         => __("Advance Payment:", "woocommerce"),
                    'value'         => $advancePayment,
                    'wrapper_class' => 'form-field-wide',
                )
            );
        }

// Save the custom editable field value as order meta data and update order item meta data  
        function save_order_custom_field_meta_data( $post_id, $post ){
            if( isset( $_POST[ 'advance_payment' ] )){
                update_post_meta( $post_id, '_advance_payment', sanitize_text_field( $_POST[ 'advance_payment' ] ) );

                // Update the existing item meta data
                if( isset( $_POST[ 'item_id_ref' ] ) ){
                    wc_update_order_item_meta( $_POST[ 'item_id_ref' ], 'Advance Payment', $_POST[ 'advance_payment' ] );
                }
            }
        }

//Display Advance Payment and calculate
        function vp_add_sub_total( $the_order ) {
            global $post, $the_order;
            if ( empty( $the_order ) || $the_order->get_id() !== $post->ID ) {
                $the_order = wc_get_order( $post->ID );
            }
            ?>
            
            <tr>
            <td class="label">Advance Payment:</td>
            <td width="1%"></td>
            <td class="total"><?php echo wc_price(get_post_meta($post->ID, "_advance_payment", true));?></td>
            </tr>
            
            <?php

            $getTotal = $the_order->get_total();

            $updateTotal = $getTotal - get_post_meta($post->ID, "_advance_payment", true);

            $the_order->set_total($updateTotal);

            $the_order->save();

        }

注意：我为此预付款创建了一个小插件。

视频链接供参考：https://www.awesomescreenshot.com/video/3589010 ?key=b26b5951753bfdc8a969b53f526a36d1

Answer 1

显示前需要进行计算Advance Payment。你可以使用woocommerce_admin_order_item_headers动作钩子。

add_action( 'woocommerce_admin_order_item_headers', 'calculate_advance_payment', 10, 1);
add_action( 'woocommerce_admin_order_totals_after_discount', 'vp_add_sub_total', 10, 1);
add_action( 'woocommerce_process_shop_order_meta', 'save_order_custom_field_meta_data', 12, 2 );
add_action( 'woocommerce_admin_order_data_after_order_details', 'editable_order_custom_field' );

// Output a custom editable field in backend edit order pages under general section
function editable_order_custom_field( $order ){            

    // Get "Delivery Type" from meta data (not item meta data)
    $updated_advance_payment = $order->get_meta('_advance_payment');

    // Replace "Delivery Type" value by the meta data if it exist
    $advancePayment = $updated_advance_payment ? $updated_advance_payment : ( isset($item_value) ? $item_value : '');

    // Display the custom editable field
    woocommerce_wp_text_input( 
        array(
            'id'            => 'advance_payment',
            'label'         => __("Advance Payment:", "woocommerce"),
            'value'         => $advancePayment,
            'wrapper_class' => 'form-field-wide',
        )
    );
}

// Save the custom editable field value as order meta data and update order item meta data  
function save_order_custom_field_meta_data( $post_id, $post ){
    if( isset( $_POST[ 'advance_payment' ] )){
        update_post_meta( $post_id, '_advance_payment', sanitize_text_field( $_POST[ 'advance_payment' ] ) );

        // Update the existing item meta data
        if( isset( $_POST[ 'item_id_ref' ] ) ){
            wc_update_order_item_meta( $_POST[ 'item_id_ref' ], 'Advance Payment', $_POST[ 'advance_payment' ] );
        }
    }
}

function calculate_advance_payment( $the_order ) {
    $getTotal = $the_order->get_total();
    $updateTotal = $getTotal - get_post_meta($the_order->get_id(), "_advance_payment", true);
    $the_order->set_total($updateTotal);
    $the_order->save();
}

function vp_add_sub_total( $the_order ) {
    global $post, $the_order; ?>
    <tr>
    <td class="label">Advance Payment:</td>
    <td width="1%"></td>
    <td class="total"><?php echo wc_price(get_post_meta($post->ID, "_advance_payment", true));?></td>
    </tr><?php
}