問題描述

如果訂單總額超過 199.99 美元，我將嘗試將免費產品添加到購物車

I am trying to add a free product to the cart if the order total is above $199.99

我已經實現了這一點，并且正在發揮作用.問題是，如果用戶隨后從購物車中刪除了一件商品并再次低于 199.99 美元(以防止玩弄系統)，我需要刪除該產品.

I have achieved this and it is working. The issue is that I need to remove the product if the user then deletes an item from the cart and goes below $199.99 again (to prevent gaming the system).

我所擁有的似乎正在發揮作用.問題是，在 REMOVE FROM CART 操作似乎起作用(或刷新頁面)之前，我似乎需要單擊 2 個鏈接.

What I have seems to be working. The problem is that it seems I need to click 2 links before the REMOVE FROM CART action seems to be working (or refresh the page).

這是什么原因造成的?是否可以通過 AJAX 完成刪除操作?

What is causing this? Can the remove action be accomplished with AJAX by any chance?

// -------------------------------------------
// ADD PRODUCT IF ORDER MINIMUM ABOVE 200

/*
* Automatically adding the product to the cart when cart total amount reach to $199.99.
*/

function aapc_add_product_to_cart() {
    global $woocommerce;

    $cart_total = 199.99;   

    if ( $woocommerce->cart->total >= $cart_total ) {
        if ( is_user_logged_in() ) {
            $free_product_id = 339;  // Product Id of the free product which will get added to cart
            $found      = false;

            //check if product already in cart
            if ( sizeof( WC()->cart->get_cart() ) > 0 ) {
                foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {
                    $_product = $values['data'];
                    if ( $_product->get_id() == $free_product_id )
                        $found = true;                  
                }
                // if product not found, add it
                if ( ! $found )
                    WC()->cart->add_to_cart( $free_product_id );
            } else {
                // if no products in cart, add it
                WC()->cart->add_to_cart( $free_product_id );
            }        
        }
    }
    if ( $woocommerce->cart->total <= $cart_total && $found ) {
                WC()->cart->remove_cart_item( $free_product_id );
            }       
}

add_action( 'template_redirect', 'aapc_add_product_to_cart' );

add_action( 'template_redirect', 'remove_product_from_cart_programmatically' );

function remove_product_from_cart_programmatically() {
    if ( is_admin() ) return;
    $product_id = 339; // product id
    $cart_total = 199.99;
    $in_cart = false;
    foreach( WC()->cart->get_cart() as $cart_item_key => $cart_item ) {
        if ( $cart_item['product_id'] === $product_id ) {
            $in_cart = true;
            $key = $cart_item_key;
            break;
        }
    }
    if( WC()->cart->total < $cart_total ) {
        if ( $in_cart ) WC()->cart->remove_cart_item( $key );
    }
}

推薦答案

你不應該使用 template_redirect 鉤子來添加或刪除基于購物車總閾值數量的免費產品......而且你的代碼是一個有點過時，有一些錯誤.

You should not use template_redirect hook to add or remove a free product based on a cart total threshold amount… Also your code is a bit outdated with some mistakes.

改為使用啟用 Ajax 的 woocommerce_before_calculate_totals 鉤子，這樣:

Instead use woocommerce_before_calculate_totals hook that is Ajax enabled, this way:

add_action( 'woocommerce_before_calculate_totals', 'add_or_remove_cart_items', 10, 1 );
function add_or_remove_cart_items( $cart ) {
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // ONLY for logged users (and avoiding the hook repetition) 
    if ( ! is_user_logged_in() && did_action( 'woocommerce_before_calculate_totals' ) >= 2 )
        return;

    $threshold_amount = 200; // The threshold amount for cart total
    $free_product_id  = 339; // ID of the free product
    $cart_items_total = 0; // Initializing

    // Loop through cart items
    foreach ( $cart->get_cart() as $cart_item_key => $cart_item ){
        // Check if the free product is in cart
        if ( $cart_item['data']->get_id() == $free_product_id ) {
            $free_item_key = $cart_item_key;
        }
        // Get cart subtotal incl. tax from items (with discounts if any)
        $cart_items_total += $cart_item['line_total'] + $cart_item['line_tax'];
    }

    // If Cart total is up to the defined amount and if the free products is not in cart, we add it.
    if ( $cart_items_total >= $threshold_amount && ! isset($free_item_key) ) {
        $cart->add_to_cart( $free_product_id );
    }
    // If cart total is below the defined amount and free product is in cart, we remove it.
    elseif ( $cart_items_total < $threshold_amount && isset($free_item_key) ) {
        $cart->remove_cart_item( $free_item_key );
    }
}

代碼位于活動子主題(或活動主題)的functions.php 文件中.經測試有效.

Code goes on functions.php file of your active child theme (or active theme). Tested and works.

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