WooCommerce limit variations per product-CodePudding

I'm selling hand-painted artwork on a WooCommerce store. Since It's hand-painted artwork, The product quantity is limited to 1 (Limit purchases to 1 item per order)

I have created product variations for the artwork frame as below :

Variation 1: Wooden Frame (stock qty = 1 in variations) Variation 2: acrylic Frame (stock qty = 1 in variations)

I want to limit the order to per product/per variations basis.

Example: A User can purchase an artwork with either a wooden or acrylic frame only.

Currently, A user can add to cart artwork with both wooden & acrylic frames.

I don't want a user to purchase a unique hand-made artwork with 2 separate variations.

How can I achieve this ? Is there any function that can be used to limit this?

CodePudding user response：

Please check below global code:

add_filter( 'woocommerce_add_to_cart_validation', 'allowed_products_variation_in_the_cart', 10, 5 );
function allowed_products_variation_in_the_cart( $passed, $product_id, $quantity, $variation_id, $variations) {
    foreach (WC()->cart->get_cart() as $cart_item_key => $cart_item) {
        if($cart_item['product_id'] == $product_id)
        {   
            wc_add_notice(__('You can\'t add this product.', 'domain'), 'error');
            $passed = false; // don't add the new product to the cart
            // We stop the loop
            break;
        }
        
    }

    return $passed;
}

Also, if you have to make it for some products then you can create a custom field in the product and enable it. Then use that custom code in the front-side and do validate in the cart validation and it will perform with your defined products.

Please let me know if you find any issues.

CodePudding user response：

Here is the code that worked for me.

add_filter( 'woocommerce_add_to_cart_validation', 'woocommerce_custom_add_to_cart_validation', 10, 5 );
function woocommerce_custom_add_to_cart_validation ($passed, $product_id, $quantity, $variation_id, $variations) {
    $variation_id_to_delete = null;
    $is_current_variation = false;
    foreach ( WC()->cart->get_cart() as $item_key => $item ) {
        $product = $item['data'];
        $attributes = $product->get_attributes();
        if($variations['attribute_varient-id'] == $product->get_attribute('varient-id')) { // IMPORTANT = ATTRIBUTE NAMES SHOULD MATCH WITH WC ATTRIBUTES
            $variation_id_to_delete = $item_key;
            $is_current_variation = true;
            break;
        }
    }
    // IF IS_CURRENT_VARIATION_ID : DELETE
    if ($is_current_variation){
        WC()->cart->remove_cart_item($variation_id_to_delete);
    }
    return $passed; 
}