自动将产品添加到购物车 WooCommerce 时排除某些类别

Question

在 WooCommerce 中，我使用代码在将任何菜品添加到购物车时自动添加包装。

function add_delivery_charge_to_cart( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

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

    $lunchbox_id  = 5737; // "LunchBox" to be added to cart
    $pakket_id = 5738; // "Pakket" to be added to cart

    // Loop through cart items
    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ) {
        // Check if "LunchBox" product is already in cart
        if( $cart_item['data']->get_id() == $lunchbox_id ) {
            $lunchbox_key = $cart_item_key;
            $lunchbox_qty = $cart_item['quantity'];
        }

        // Check if "Pakket" product is already in cart
        if( $cart_item['data']->get_id() == $pakket_id ) {
            $pakket_key = $cart_item_key;
            $pakket_qty = $cart_item['quantity'];
        }       
    }

    // Get total items in cart, counts number of products and quantity per product
    $total_items_in_cart = WC()->cart->get_cart_contents_count();

    // If product "LunchBox" is in the cart, we check the quantity to update it if needed
    if ( isset($lunchbox_key) && $lunchbox_qty != $total_items_in_cart ) {
        // Lunchbox total = total_items_in_cart 
        $lunchbox_total = $total_items_in_cart;

        // Isset lunchbox qty, lunchbox total - lunchbox qty
        if ( isset($lunchbox_qty) ) {
            $lunchbox_total = $lunchbox_total - $lunchbox_qty;
        }

        // Isset pakket qty, lunchbox total - pakket qty        
        if ( isset($pakket_qty) ) {
            $lunchbox_total = $lunchbox_total - $pakket_qty;
        } 

        // Set quantity, lunchbox
        $cart->set_quantity( $lunchbox_key, $lunchbox_total );

    } elseif ( !isset($lunchbox_key) && $total_items_in_cart > 0 ) {
        // Product "LunchBox" is not in cart, we add it
        $cart->add_to_cart( $lunchbox_id, $total_items_in_cart );
    }

    // Total items in cart greater than or equal to 3
    if ( $total_items_in_cart >= 3 ) {
        // Pakket total = total_items_in_cart 
        $pakket_total = $total_items_in_cart;

        // Isset lunchbox qty, pakket total - lunchbox qty
        if ( isset($lunchbox_qty) ) {
            $pakket_total = $pakket_total - $lunchbox_qty;
        }

        // Isset pakket qty, pakket total - pakket qty      
        if ( isset($pakket_qty) ) {
            $pakket_total = $pakket_total - $pakket_qty;
        }       


        // Pakket total = pakket_total / 3 = floor(result)
        // Floor = round fractions down, rounding result down
        $pakket_total = floor( $pakket_total / 3 );

        // If product "Pakket" is in cart
        if ( isset($pakket_key) ) {         
            $cart->set_quantity( $pakket_key, $pakket_total );
        } elseif ( !isset($pakket_key) ) {
            // Product "Pakket" is not in cart, we add it
            $cart->add_to_cart( $pakket_id, $pakket_total );
        }
    }
}
add_action( 'woocommerce_before_calculate_totals', 'add_delivery_charge_to_cart', 10, 1 );

默认情况下，包装会自动添加到所有产品中。但对我来说这是错误的。

我需要排除某些类别，例如 "Drink" 和 "Bread"，这样包装就不会与这些类别的每个产品一起添加。

我知道可以添加以下代码：

// Excluded product categories in this array (Can be IDs, slugs or names)
$excl_cats = array( 'drink', 'bread' ); 

及条件：

if( ! has_term( $excl_cats, 'product_cat', $product_id ) )

只是我不知道上面的代码应该怎么正确

我很乐意为您提供帮助！

Answer 1

只要产品包含特定类别，该产品的数量就会添加到 $category_qty_total 变量中。之后从购物车中的商品总数中减去此总数

/**
 * Calculate the number of lunchboxes and package, based on the number of products in cart.
 */ 
function add_delivery_charge_to_cart( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

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

    /********** SETTINGS **********/

    $lunchbox_id  = 5737; // "LunchBox ID" to be added to cart
    $pakket_id = 5738; // "Pakket ID" to be added to cart
    $exclude_categories = array( 'drink', 'bread' ); // Exclude these categories

    $category_qty_total = 0; // Total of category quantity items, Don't edit!!

    /********** LOOP THROUGH CART ITEMS **********/

    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ) {
        // Get product id
        $product_id = $cart_item['data']->get_id();

        // Get product quantity
        $product_qty = $cart_item['quantity'];

        // Check if "LunchBox" product is already in cart
        if( $product_id == $lunchbox_id ) {
            $lunchbox_key = $cart_item_key;
            $lunchbox_qty = $product_qty;
        }

        // Check if "Pakket" product is already in cart
        if( $product_id == $pakket_id ) {
            $pakket_key = $cart_item_key;
            $pakket_qty = $product_qty;
        }

        // Check if product belongs to a certain category
        if( has_term( $exclude_categories, 'product_cat', $product_id ) ) {
            $category_qty_total += $product_qty;
        }
    }

    /********** CALCULATE THE TOTALS, SO "LUNCHBOX", "PAKKET" & CATEGORIES ARE NOT USED IN THE TOTALS **********/

    // Get total items in cart, counts number of products & quantity per product
    $total_items_in_cart = $cart->get_cart_contents_count();

    // Total items in cart - category quantity total
    $total_items_in_cart -= $category_qty_total;

    // Lunchbox total = total_items_in_cart & pakket total = total_items_in_cart 
    $lunchbox_total = $total_items_in_cart;
    $pakket_total = $total_items_in_cart;

    // Isset lunchbox qty -> lunchbox total - lunchbox qty & pakket total - lunchbox qty
    if ( isset($lunchbox_qty) ) {
        $lunchbox_total -= $lunchbox_qty;
        $pakket_total -= $lunchbox_qty;     
    }

    // Isset pakket qty -> lunchbox total - pakket qty & pakket total - pakket qty   
    if ( isset($pakket_qty) ) {
        $lunchbox_total -= $pakket_qty;
        $pakket_total = $pakket_total - $pakket_qty;
    }

    /********** APPLY NEW TOTALS TO LUNCHBOX & PAKKET **********/

    // If product "LunchBox" is in cart, we check the quantity to update it if needed
    if ( isset($lunchbox_key) && $lunchbox_qty != $total_items_in_cart ) {
        // Set quantity, lunchbox
        $cart->set_quantity( $lunchbox_key, $lunchbox_total );

    } elseif ( !isset($lunchbox_key) && $total_items_in_cart > 0 ) {
        // Product "LunchBox" is not in cart, we add it
        $cart->add_to_cart( $lunchbox_id, $total_items_in_cart );
    }

    // Total items in cart greater than or equal to 3
    if ( $total_items_in_cart >= 3 ) {
        // Pakket total = pakket_total / 3 = floor(result)
        // Floor = round fractions down, rounding result down
        $pakket_total = floor( $pakket_total / 3 );

        // If product "Pakket" is in cart
        if ( isset($pakket_key) ) {
            // Set quantity, pakket
            $cart->set_quantity( $pakket_key, $pakket_total );

        } elseif ( !isset($pakket_key) ) {
            // Product "Pakket" is not in cart, we add it
            $cart->add_to_cart( $pakket_id, $pakket_total );
        }
    }
}
add_action( 'woocommerce_before_calculate_totals', 'add_delivery_charge_to_cart', 10, 1 );