强制以单独的顺序出售特定的WooCommerce产品 [英] Force specific WooCommerce product to be sold in separate order

问题描述

我试图强制WooCommerce中的特定产品单独出售.但是，我希望该产品无限量出售.

I'm trying to force a specific product in WooCommerce to be sold separately. I however want this product to sell in unlimited quantity.

基于强制单独出售要在WooCommerce中单独购买的产品效果很好，我目前正在使用:

Based on Force sold individually product to be bought alone in WooCommerce answer code which works quite well, I am currently using:

function filter_woocommerce_add_to_cart_validation( $passed, $product_id, $quantity, $variation_id = null, $variations = null ) {
    // Product id to bought alone 
    $product_id_alone = 666;
 
    // Set variable
    $alone = true;
 
    // If passed
    if ( $passed ) {
        // If cart is NOT empty when a product is added
        if ( !WC()->cart->is_empty() ) {
 
            // If product id added = product id alone
            if ( $product_id_alone == $product_id ) {
                $alone = false;
            } else {
                // Generate a unique ID for the cart item
                $product_cart_id = WC()->cart->generate_cart_id( $product_id_alone );
 
                // Check if product is in the cart
                $in_cart = WC()->cart->find_product_in_cart( $product_cart_id );
 
                // If product is already in cart
                if ( $in_cart ) {
                    $alone = false;
                }
            }
        } else {
 
            if ( $product_id_alone == $product_id) {
                $alone = true;         
            }
        }
    }
 
    if ( $alone == false ) {
        // Set error message
        $message = 'Product 666 must be bought separately.';
        wc_add_notice( __( $message, 'woocommerce' ), 'error' );
        $passed = false;
    }
 
    return $passed;
}
add_filter( 'woocommerce_add_to_cart_validation', 'filter_woocommerce_add_to_cart_validation', 10, 5 );

---

如果购物车是空的，我可以添加ID 666和自定义数量的产品.

---

If the cart is empty, I can add product with ID 666 with a custom quantity.

一旦将商品ID 666添加到购物车中，便无法将其他商品添加到购物车中.

Once product ID 666 has been added to the cart, I can't add another product to the cart.

如果我先将其他产品添加到空购物车中，则无法将产品ID 666添加到购物车中.

And if I start by adding another product to an empty cart, I can't add product ID 666 to the cart.

问题是，如果我将产品ID 666添加到空购物车中，则无法通过向购物车中添加更多产品来增加产品666的数量.

The issue is that if I add product ID 666 to an empty cart I can't increase quantity of product 666 by adding more of that product into the cart.

推荐答案

要强制以单独的顺序单独出售特定产品，请使用:

To force a specific product to be sold alone, in a separate order, use:

function filter_woocommerce_add_to_cart_validation( $passed, $product_id, $quantity, $variation_id = null, $variations = null ) {
    // Product id to bought alone 
    $product_id_alone = 666;

    // Set variable
    $flag = false;

    // If cart is NOT empty when a product is added
    if ( ! WC()->cart->is_empty() ) {
        // Generate a unique ID for the cart item
        $product_cart_id = WC()->cart->generate_cart_id( $product_id_alone );

        // Check if product is in the cart
        $in_cart = WC()->cart->find_product_in_cart( $product_cart_id );

        // If product is already in cart & product ID added is not equal to product ID alone
        if ( $in_cart && ( $product_id != $product_id_alone ) ) {
            $flag = true;
        // Product ID alone is NOT in cart & product ID added is equal to product ID alone
        } elseif( ! $in_cart && ( $product_id == $product_id_alone ) ) {
            $flag = true;
        }
    }

    // True
    if ( $flag ) {
        // Set error message
        wc_add_notice( sprintf(
            __( 'Product %s must be bought separately', 'woocommerce' ),
            $product_id_alone,
        ), 'error' );

        // Passed = false
        $passed = false;
    }

    return $passed;
}
add_filter( 'woocommerce_add_to_cart_validation', 'filter_woocommerce_add_to_cart_validation', 10, 5 );

---

添加ID为666的产品时:

---

When adding the product with ID 666:

• 如果购物车为空，则可以添加任意数量的产品.
• 如果购物车不为空&ID为666的产品不在购物车中，请停止.
• 如果购物车不为空&ID为666的产品在购物车中，继续.

添加具有不同ID的产品时:

When a product with a different ID is added:

• 如果购物车为空，则可以添加任意数量的产品.
• 如果购物车不为空&ID为666的产品不在购物车中，继续.
• 如果购物车不为空&ID为666的产品在购物车中，请停止.

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