如果产品已经在购物车中，则禁用Woocommerce添加到购物车按钮 [英] Disable Woocommerce add to cart button if the product is already in cart

问题描述

我试图在Woocommerce中的添加到购物车"按钮上设置功能，以仅允许将特定产品添加到购物车一次.

I am trying to set the functionality in Woocommerce on the Add to Cart button to only allow a particular product to be added once to the Cart.

第一次将特定产品添加到购物车后，需要隐藏添加到购物车".

Once a particular product has been added to cart the first time, the Add to Cart needs to be hidden.

在购物车中，我可以有任意数量的产品-每个产品最多只能有数量1.

In the cart I can have any number of products - just a max of quantity 1 for each product.

我正在研究，发现可以使用woocommerce_add_to_cart_validation挂钩.但是不知道如何开始.

I was doing research and saw that I can use woocommerce_add_to_cart_validation hook. But have no idea how to start off.

如何允许将特定产品添加到购物车一次?

How can I allow a particular product to be added once to the Cart?

推荐答案

如果使用woocommerce_is_purchasable挂钩将商品放入购物车，则禁用添加到购物车"按钮:

Disable add to cart button if product is in cart using woocommerce_is_purchasable hook:

add_filter( 'woocommerce_is_purchasable', 'disable_add_to_cart_if_product_is_in_cart', 10, 2 );
function disable_add_to_cart_if_product_is_in_cart ( $is_purchasable, $product ){
    // Loop through cart items checking if the product is already in cart
    foreach ( WC()->cart->get_cart() as $cart_item ){
        if( $cart_item['data']->get_id() == $product->get_id() ) {
            return false;
        }
    }
    return $is_purchasable;
}

代码进入您的活动子主题(或活动主题)的function.php文件中.经过测试并可以正常运行(甚至针对可变产品中的产品变化).

Code goes in function.php file of your active child theme (or active theme). Tested and works (even for product variations in variable products).

原始答案: 这是一个使用woocommerce_add_to_cart_validation挂钩的示例，该示例可以解决问题(防止添加到购物车操作并在需要时显示自定义通知)，并使用一个自定义实用程序功能，该功能将删除您所定义的特定产品ID的数量字段:

Original answer: Here is an example using woocommerce_add_to_cart_validation hook and that will do the trick (preventing add to cart action and displaying a custom notice when needed), and using a custom utility function that will remove quantity field for your specific defined product ID:

add_filter( 'woocommerce_add_to_cart_validation', 'limit_cart_items_from_category', 10, 3 );
function limit_cart_items_from_category ( $passed, $product_id, $quantity ){
    // HERE define your product ID
    $targeted_product_id = 37;

    // Check quantity and display notice
    if( $quantity > 1 && $targeted_product_id == $product_id ){
        wc_add_notice( __('Only one item quantity allowed for this product', 'woocommerce' ), 'error' );
        return false;
    }

    // Loop through cart items checking if the product is already in cart
    foreach ( WC()->cart->get_cart() as $cart_item ){
        if( $targeted_product_id == $product_id && $cart_item['data']->get_id() == $targeted_product_id ) {
            wc_add_notice( __('This product is already in cart (only one item is allowed).', 'woocommerce' ), 'error' );
            return false;
        }
    }
    return $passed;
}

// Checking and removing quantity field for a specific product 
add_filter( 'woocommerce_quantity_input_args', 'custom_quantity_input_args', 10, 2 );
function custom_quantity_input_args( $args, $product ) {
    // HERE define your product ID
    $targeted_product_id = 37;

    if( $targeted_product_id == $product->get_id() )
        $args['min_value'] = $args['max_value'] = $args['input_value'] = 1;

    return $args;
}

代码进入您的活动子主题(或活动主题)的function.php文件中.经过测试，可以正常工作.

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

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