在Woocommerce迷你购物车/购物车中设置自定义计算商品价格 [英] Set a custom calculated item price in Woocommerce mini-cart / Cart

问题描述

当前，我根据不同的情况对产品价格进行一些自定义计算.当客户将产品添加到购物车中时，会在会话数据， cart_item_data ['my-price'] 中设置自定义价格，并且我使用 add_filter('woocommerce_add_cart_item')来实现功能和一切似乎现在都在工作.

Currently i have some custom calculation of product price based on different situation. When customer added a product in to cart then the custom price is set in session data , cart_item_data['my-price'] and i implemented using add_filter( 'woocommerce_add_cart_item') function and everything seems to working now .

现在查看购物车页面中的价格，结帐页面与我的 cart_item_data ['my-price']正确.

Now the price in view cart page, checkout page is correct with my cart_item_data['my-price'].

但是我面临的唯一问题是菜单中出现的woocommerce迷你购物车中的价格未更新，该如何更改?

当我在Google上看到过滤器

When i google i see a filter

add_filter('woocommerce_cart_item_price');

但是我不明白如何使用它，我会执行以下操作

but i can't understand how to use this i do the following

    add_filter('woocommerce_cart_item_price','modify_cart_product_price',10,3);

function modify_cart_product_price( $price, $cart_item, $cart_item_key){
  if($cart_item['my-price']!==0){
      $price =$cart_item['my-price'];
    }
    return $price;
    //exit;
}

此处单个价格正确，但总价格不正确

推荐答案

更新 (2021年10月)

为了成功进行此测试(并且我不知道您如何进行计算)，我在产品添加到购物车表单中添加了以下自定义隐藏字段:

For testing this successfully (and as I don't know how you make calculations), I have added a custom hidden field in product add to cart form with the following:

// The hidden product custom field
add_action( 'woocommerce_before_add_to_cart_button', 'add_gift_wrap_field' );
function add_gift_wrap_field() {
    global $product;
    // The fake calculated price
    ?>
        <input type="hidden" id="my-price" name="my-price" value="115">
    <?php
}

将产品添加到购物车时，此 my-price 自定义字段也会被提交(发布).要在购物车对象中设置此值，请使用以下功能:

When product is added to cart, this my-price custom field is also submitted (posted). To set this value in cart object I use the following function:

add_filter( 'woocommerce_add_cart_item', 'custom_cart_item_prices', 20, 2 );
function custom_cart_item_prices( $cart_item_data, $cart_item_key ) {
    // Get and set your price calculation
    if( isset( $_POST['my-price'] ) ){
        $cart_item_data['my-price'] = $_POST['my-price'];

        // Every add to cart action is set as a unique line item
        $cart_item_data['unique_key'] = md5( microtime().rand() );
    }

    return $cart_item_data;
}

现在将新的计算出的价格 my-price 应用于(设置)购物车项目，我使用最后一个函数:

Now to apply (set) the new calculated price my-price to the cart item, I use this last function:

// For mini cart *(cart item displayed price)*
add_action( 'woocommerce_cart_item_price', 'filter_cart_item_price', 10, 2 );
function filter_cart_item_price( $price, $cart_item ) {
    if ( ! is_checkout() && isset($cart_item['my-price']) ) {
        $args = array( 'price' => floatval( $cart_item['my-price'] ) );

        if ( WC()->cart->display_prices_including_tax() ) {
            $product_price = wc_get_price_including_tax( $cart_item['data'], $args );
        } else {
            $product_price = wc_get_price_excluding_tax( $cart_item['data'], $args );
        }
        return wc_price( $product_price );
    }
    return $price;
}

add_action( 'woocommerce_before_calculate_totals', 'set_calculated_cart_item_price', 20, 1 );
function set_calculated_cart_item_price( $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 ){
        if( isset( $cart_item['my-price'] ) && ! empty( $cart_item['my-price'] ) || $cart_item['my-price'] != 0 ){
            // Set the calculated item price (if there is one)
            $cart_item['data']->set_price( $cart_item['my-price'] );
        }
    }
}

所有代码都放入您的活动子主题(或活动主题)的function.php文件中.

经测试可正常工作

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