在WooCommerce中选择产品权重后计算并显示新价格
在WooCommerce中，我使用一个代码来显示牛排重量选择表单，保存选择数据，并在编辑订单和电子邮件通知时将这些数据显示在购物车、结账页面上。
// Display Custom Checkbox Field
add_action('woocommerce_product_options_general_product_data', 'steak_custom_field_add');
function steak_custom_field_add(){
global $post;
// Checkbox
woocommerce_wp_checkbox(
array(
'id' => '_steak_checkbox',
'label' => __('Steak Weight', 'woocommerce' ),
'description' => __( 'If necessary, enable steak weight selection', 'woocommerce' )
)
);
}
// Save Custom Checkbox Field
add_action('woocommerce_process_product_meta', 'steak_custom_field_save');
function steak_custom_field_save($post_id){
// Custom Product Checkbox Field
$steak_checkbox = isset( $_POST['_steak_checkbox'] ) ? 'yes' : 'no';
update_post_meta($post_id, '_steak_checkbox', esc_attr( $steak_checkbox ));
}
// Display Custom Select Box
add_action( 'woocommerce_before_add_to_cart_button', 'display_steak_custom_field', 0 );
function display_steak_custom_field() {
global $product;
// If is single product page and have the "steak_checkbox" enabled we display the field
if ( $product->get_meta( '_steak_checkbox' ) === 'yes' ) {
echo '<div class="steak_select_box">';
$select = woocommerce_form_field( 'steak_custom_options', array(
'type' => 'select',
'class' => array('my-steak-select-box form-row-wide'),
'label' => __('Steak Weight'),
'required' => false,
'return' => false,
'options' => array(
'' => 'Select...',
'300g' => '300g',
'400g' => '400g',
'500g' => '500g',
'600g' => '600g',
'700g' => '700g',
'800g' => '800g',
'900g' => '900g',
'1000g' => '1000g'
)
), '' );
echo $select;
echo '</div>';
}
}
// Add as custom cart item data
add_filter( 'woocommerce_add_cart_item_data', 'add_custom_steak_cart_item_data', 10, 21 );
function add_custom_steak_cart_item_data($cart_item_data, $product_id, $variation_id ){
if( isset( $_POST['steak_custom_options'] ) ) {
$cart_item_data['steak_option'] = wc_clean( $_POST['steak_custom_options'] );
}
return $cart_item_data;
}
// Add custom fields values under cart item name in cart
add_filter( 'woocommerce_cart_item_name', 'steak_custom_field_add_cart', 10, 21 );
function steak_custom_field_add_cart( $item_name, $cart_item, $cart_item_key ) {
if( ! is_cart() )
return $item_name;
if( isset($cart_item['steak_option']) ) {
$item_name .= '<div class="my-steak-class"><strong>' . __("Steak Weight", "woocommerce") . ':</strong> ' . $cart_item['steak_option'] . '</div>';
}
return $item_name;
}
// Display custom fields values under item name in checkout
add_filter( 'woocommerce_checkout_cart_item_quantity', 'steak_custom_checkout_cart_item_name', 10, 21 );
function steak_custom_checkout_cart_item_name( $item_qty, $cart_item, $cart_item_key ) {
if( isset($cart_item['steak_option']) ) {
$item_qty .= '<div class="my-steak-class"><strong>' . __("Steak Weight", "woocommerce") . ':</strong> ' . $cart_item['steak_option'] . 'гр.</div>';
}
return $item_qty;
}
// Save chosen select field value to each order item as custom meta data and display it everywhere
add_action('woocommerce_checkout_create_order_line_item', 'save_order_item_steak_field', 10, 21 );
function save_order_item_steak_field( $item, $cart_item_key, $values, $order ) {
if( isset($values['steak_option']) ) {
$key = __('Steak Weight', 'woocommerce');
$value = $values['steak_option'];
$item->update_meta_data( $key, $value ,$item->get_id());
}
}
add_action('wp_footer','add_footer_steak_script');
function add_footer_steak_script(){
?>
<script>
( function( $ ) {
$( document ).ready( function() {
$(document).on('change', '#steak_custom_options' ,function() {
$('.add_to_cart_button').data('steak_custom_options', this.value)
});
});
}( jQuery ) );
</script>
<?php
}
但不幸的是，我不知道如何解决一个问题...
这种产品的价格是按100克计算的。最小订货量是300克。我需要的是，在选择产品的重量时，应该相应地计算该产品的最终成本。
例如：
for 300g - $regular_price * 3 = $new_price
for 500g - $regular_price * 5 = $new_price
for 1000g - $regular_price * 10 = $new_price
等
此产品的总成本应显示在每100克主价的旁边。
我认为这段代码对其他开发人员也很有用。如果你能帮忙，我会很高兴的！
解决方案
调整产品价格，在购物车页面等。根据从下拉列表中选择的权重，添加以下代码
function my_before_calculate_totals( $cart ) {
if ( is_admin() && ! defined( 'DOING_AJAX' ) )
return;
if ( did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
return;
// Loop through cart items
foreach ( $cart->get_cart() as $cart_item_key => $cart_item ) {
if( isset( $cart_item['steak_option'] ) ) {
// Remove the last 2 zeros (100g becomes 1, 300g becomes 3, 1000g becomes 10, etc...)
// Remove 'g' from grams
// convert string to integer
$chosen_weight = (int) str_replace( '00', '', str_replace('g', '', $cart_item['steak_option']) );
// Get current price
$current_price = $cart_item['data']->get_price();
// Set new price, price is already known per 100g
$cart_item['data']->set_price( $current_price * $chosen_weight );
}
}
}
add_action( 'woocommerce_before_calculate_totals', 'my_before_calculate_totals', 10, 1 );
要更改单一产品页面上的价格，请根据下拉菜单添加以下内容
function add_footer_steak_script() {
global $woocommerce, $product;
?>
<script type="text/javascript">
jQuery(document).ready(function ($) {
console.log('JS works!');
var price = <?php echo $product->get_price(); ?>, currency = '<?php echo get_woocommerce_currency_symbol(); ?>';
$( '[name=steak_custom_options]' ).change(function(){
if (!(this.value < 1)) {
var dropdown_val = this.value;
var remove_g = dropdown_val.replace( 'g', '' );
var remove_double_zero = remove_g.replace( '00', '' );
var product_total = parseFloat( price * remove_double_zero );
$( '.woocommerce-Price-amount' ).html( currency + product_total.toFixed(2));
}
});
});
</script>
<?php
}
add_action('wp_footer','add_footer_steak_script');
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