問題描述

當購物車中添加了具有特殊產品類別cat_x"的項目并顯示一些不同的自定義通知時，我使用下面的代碼從購物車中刪除其他 WooCommerce 產品類別項目.代碼來自這個線程并且可以正常工作嗯:

I am using the code below to remove other WooCommerce product category items from the cart when there is an item with a special product category 'cat_x' added in cart and display some different custom notices. The code came from this thread and just works well:

add_action( 'woocommerce_check_cart_items', 'checking_cart_items' );
function checking_cart_items() {
    $special = false;
    $catx = 'cat_x';
    $number_of_items = sizeof( WC()->cart->get_cart() );

    if ( $number_of_items > 0 ) {

        // Loop through all cart products
        foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {
            $item = $values['data'];
            $item_id = $item->id;

            // detecting if 'cat_x' item is in cart
            if ( has_term( $catx, 'product_cat', $item_id ) ) {
                if (!$special)
                    $special = true;
            }
        }

        // Re-loop through all cart products
        foreach ( WC()->cart->get_cart() as $cart_item_key => $values ) {
            $item = $values['data'];
            $item_id = $item->id;

            if ( $special ) // there is a 'cat_x' item in cart
            { 
                if ( $number_of_items == 1 ) { // only one 'cat_x' item in cart
                    if ( empty( $notice ) )
                        $notice = '1';
                }
                if ( $number_of_items >= 2 ) { // 'cat_x' item + other categories items in cart
            // removing other categories items from cart
                    if ( !has_term( $catx, 'product_cat', $item_id ) ) {
                        WC()->cart->remove_cart_item( $cart_item_key ); // removing item from cart
                        if ( empty( $notice ) || $notice == '1' )
                            $notice = '2';
                    }
                }
            } else { // Only other categories items
                if ( empty( $notice ) )
                    $notice = '3';
            }
        }

        // Firing notices
        if ( $notice == '1' ) { // message for an 'cat_x' item only (alone)
            wc_add_notice( sprintf( '<p class="woocommerce-error">bla bla bla one category X item in the cart</p>' ), 'success' );
        } elseif ( $notice == '2' ) { // message for an 'cat_x' item and other ones => removed other ones 
            wc_add_notice( sprintf( '<p class="woocommerce-error">bla bla bla ther is already category X in the cart => Other category items has been removed</p>' ), 'error' );
        } elseif ( $notice == '3' ) { // message for other categories items (if needed)
            wc_add_notice( sprintf( '<p class="woocommerce-error">bla bla bla NOT category X in the cart</p>' ), 'success' );
        }
    }
} 

有條件函數 has_term() 也適用于類別數組，我嘗試在該代碼中設置類別數組而不是一個類別.但它不起作用.

Has the conditional function has_term() works also with arrays of categories, I have tried instead of one category, to set an array of categories in that code. But it’s not working.

但是，我的需求發生了變化:我不想讓客戶有可能從不同類別中選擇購物車項目.因此，購物車必須始終包含來自同一產品類別的商品.

However, my needs have changed: I don’t want to let the customer have the possibility to select cart items from different categories. So the cart must always have items from the same product category.

有什么幫助嗎?

謝謝.

推薦答案

制作一個掛在 woocommerce_add_to_cart_validation 過濾器鉤子中的自定義函數將以更簡單的方式完成這項工作，無需設置類別數組.

Making a custom function hooked in woocommerce_add_to_cart_validation filter hook is going to do the job in a much more simpler way, without any need to set an array of categories.

所以你的代碼會更快更緊湊.此外，您還可以顯示自定義通知以警告客戶.

So your code will be much more faster and compact. Additionally you can display a custom notice to warn the customer.

如果購物車中有不同類別的商品，此代碼將避免添加到購物車:

This code will avoid adding to cart, if an item of a different category is in cart:

add_filter( 'woocommerce_add_to_cart_validation', 'add_to_cart_validation_callback', 10, 3 );
function add_to_cart_validation_callback( $passed, $product_id, $quantity) {
    // HERE set your alert text message
    $message = __( 'MY ALERT MESSAGE.', 'woocommerce' );
    
    if( ! WC()->cart->is_empty() ) {
        // Get the product category terms for the current product
        $terms_slugs = wp_get_post_terms( $product_id, 'product_cat', array('fields' => 'slugs'));
        
        // Loop through cart items
        foreach (WC()->cart->get_cart() as $cart_item ){
            if( ! has_term( $terms_slugs, 'product_cat', $cart_item['product_id'] )) {
                $passed = false;
                wc_add_notice( $message, 'error' );
                break;
            }
        }
    }
    return $passed;
}

代碼位于活動子主題(或主題)的 function.php 文件或任何插件文件中.

此代碼已經過測試并且可以運行

This code is tested and it works

限制購物車中的商品只能來自不同的產品類別:

替換函數中的條件:

if( ! has_term( $product_cats, 'product_cat', $cart_item['product_id'] )) { 

由

if( has_term( $product_cats, 'product_cat', $cart_item['product_id'] )) {

這篇關于限制購物車項目來自 WooCommerce 中的同一產品類別的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！