Set default order comments based on cart total in WooCommerce-CodePudding

I want to add a default order comment (or pre populate the order_comments field) if the cart total is over 25 euros.

I already found this post about it: Add a custom order note programmatically in Woocommerce admin order edit pages

I almost got it working:

add_filter( 'woocommerce_checkout_fields' , 'set_default_order_comment' );
function set_default_order_comment( $order, $fields ) {
    // Targeting My account section
    if ( $order->get_total() > 25 ) {
        $fields['order']['order_comments']['default'] = 'Custom note!!';
    }
    return $fields;
}

At least, I think this should be it, but not quite right yet. I got this error:

Fatal error: Uncaught ArgumentCountError: Too few arguments to function

How can create a simple function that checks the total amount in cart and if it is over 25 euro automaticly add an default order comment to the order?

CodePudding user response：

It can be done like this.

/**
 * Add a custom note when the order total is above 25.
 *
 * @param int      $order_id Order ID.
 * @param WC_Order $order    Order object.
 */
function vkh_woocommerce_new_order_action( $order_id, $order ) {
    if ( $order->get_total() > 25 ) {
        $note = __( 'Write your note here!' );

        // Add the note
        $order->add_order_note( $note );
    }
}
add_action( 'woocommerce_new_order', 'vkh_woocommerce_new_order_action', 10, 2 );

CodePudding user response：

The error is there because $order is not an argument of the woocommerce_checkout_fields filter hook, you should use get_cart_contents_total() instead

So you get:

function filter_woocommerce_checkout_fields( $fields ) {
    // Get cart total
    $cart_total = WC()->cart->get_cart_contents_total();

    // Greater than
    if ( $cart_total > 25 ) { 
        $fields['order']['order_comments']['default'] = __( 'Custom note!', 'woocommerce' );
    }   

    return $fields;
}
add_filter( 'woocommerce_checkout_fields' , 'filter_woocommerce_checkout_fields', 10, 1 );