WooCommerce中的库存数量例外

Question

Right now, I am bringing users to a Contact 7 Form, and adding to cart using the href link, http://example.com/checkout/?add-to-cart=1000

I have a unique case where if there is 1 item left of product 1000, and the user chooses 2 in the dropdown box, then I should increase product 1000's quantity by 2 and allow the user to checkout normal.

I have looked at the woocommerce_add_to_cart and woocommerce_add_to_cart_validation hooks, but couldn't figure it out.

I just need to understand, how I can make the modification before the user is directed to the checkout page and are not shown the "You cannot add that amount to the cart" message.

Answer 1

add_filter( 'woocommerce_product_get_stock_quantity', 'hook_get_stock_quantity', 10, 2 );
add_filter( 'woocommerce_product_variation_get_stock_quantity', 'hook_get_stock_quantity', 10, 2 );
function hook_get_stock_quantity( $value, $product ) {
    if($value < 2) $value = 10;
    return $value;
}