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使用产品自定义字段值覆盖woocommerce购物车商品价格

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在woocommerce中，我使用高级自定义字段并尝试将每个产品中的自定义字段值作为价格而不是默认产品价格 . 此自定义字段称为 'custom_price' .

如何更改此硬编码值以使用它？

这是我的代码：

add_action( 'woocommerce_before_calculate_totals', 'add_custom_price' 
 );

 function add_custom_price( $cart_object ) {
     $custom_price = 10; 
     foreach ( $cart_object->cart_contents as $key => $value ) {
         $value['data']->set_price($custom_price);
     }
 }
php wordpress woocommerce cart custom-fields

1 回答

  • 3

    Update 3: 以下是包含所有自定义字段和购物车商品价格变化的完整解决方案 .

    您需要添加一些jQuery代码来进行产品价格计算，在产品页面上显示计算出的价格，并在隐藏字段上设置此计算价格 .

    将产品添加到购物车后，代码将捕获计算出的价格并将其设置在相应的购物车项目中...

    代码：

    // The product custom field - Frontend
add_action( 'woocommerce_before_add_to_cart_button', 'custom_discount_price_product_field' );
function custom_discount_price_product_field() {
    global $product;

    $curs = get_woocommerce_currency_symbol(); // Currency symbol

    // Get the discounted value (from product backend)
    $discount = (float) get_post_meta( $product->get_id(), '_price_discount', true );

    // jQuery will get the discount here for calculations
    echo '<input type="hidden" name="price_discount" value="'.$discount.'">';

    echo '<div>';

    woocommerce_form_field( 'select_price', array(
        'type'          => 'select',
        'class'         => array('my-field-class form-row-wide'),
        'label'         => __('Discount'),
        'options'     => array(
            ''      => __( 'Select your discount', 'woocommerce' ),
            '5'     => $curs . '5',
            '10'    => $curs . '10',
            '15'    => $curs . '15',
            '20'    => $curs . '20',
        ),
    ), '' );

    // This field will be used to send the calculated price
    // jQuery will set the calculated price on this field
    echo '<input type="hidden" name="custom_price" value="52">'; // 52 is a fake value for testing purpose

    echo '</div><br>';

    // BELOW your jquery code to calculate price and update "custom_price" hidden field
    ?>
    <script type="text/javascript">
    jQuery( function($){
        // Here
    });
    </script>
    <?php
}

// Add a custom field to product in backend
add_action( 'woocommerce_product_options_pricing', 'add_field_product_options_pricing' );
function add_field_product_options_pricing() {
    global $post;

    echo '<div class="options_group">';

    woocommerce_wp_text_input( array(
        'id'            => '_price_discount',
        'label'         => __('Discount price', 'woocommerce') . ' (%)',
        'placeholder'   => __('Set the Discount price…', 'woocommerce'),
        'description'   => __('Enter the custom value here.', 'woocommerce'),
        'desc_tip'      => 'true',
    ));

    echo '</div>';
}

// Save product custom field to database when submitted in Backend
add_action( 'woocommerce_process_product_meta', 'save_product_options_custom_fields', 30, 1 );
function save_product_options_custom_fields( $post_id ){
    // Saving custom field value
    if( isset( $_POST['_price_discount'] ) ){
        update_post_meta( $post_id, '_price_discount', sanitize_text_field( $_POST['_price_discount'] ) );
    }
}

// Add custom calculated price conditionally as custom data to cart items
add_filter( 'woocommerce_add_cart_item_data', 'add_custom_price_to_cart_item_data', 20, 2 );
function add_custom_price_to_cart_item_data( $cart_item_data, $product_id ){
    if( ! isset($_POST['custom_price']) )
        return $cart_item_data;

    $cart_item_data['custom_price'] = (float) sanitize_text_field( $_POST['custom_price'] );
    $cart_item_data['unique_key'] = md5( microtime() . rand() ); // Make each item unique

    return $cart_item_data;
}

// Set conditionally a custom item price
add_action('woocommerce_before_calculate_totals', 'set_cutom_cart_item_price', 20, 1);
function set_cutom_cart_item_price( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    foreach (  $cart->get_cart() as $cart_item ) {
        if ( isset( $cart_item['custom_price'] ) )
            $cart_item['data']->set_price( $cart_item['custom_price'] );
    }
}

    代码位于活动子主题（或活动主题）的function.php文件中 . 经过测试和工作（但你需要用jquery进行自己的计算）

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