Send invoice only for a specific product

Hi @redmorgane,

Just to be sure, do you want to disable just the attachment for that specific product ID, or the invoice creation altogether (that is what your code try to do)? If this last, please update your code with this one:

/**
 * Enable the invoice for certain products
 */
add_filter('wpo_wcpdf_document_is_allowed', function( $allowed, $document ) {
	if ( $document->get_type() == 'invoice' ) {		
		if ( $document->exists() ) {
			return $allowed;
		}
		$allowed = false; // disabled by default
		$products_ids = array( 18 ); // Enter here all the allowed product IDs
		if ( ! empty( $order = $document->order) && $document->get_type() == 'invoice' ) {
			foreach( $order->get_items() as $item_id => $item ) {
				$product_id = $item['variation_id'] != 0 ? $item['variation_id'] : $item['product_id'];
				if( in_array($product_id, $products_ids) ) {
					$allowed = true; // enable if the product ID match
					break;
				}			
			}
		}
	}	
	return $allowed;
}, 10, 2);

Let me know if it worked! ??

Hi @yordansoares

Thank you for your reply !
I just gave your code a try, but unfortunately it doesn’t seems to work.
No PDF is being sent at all, for any product.
I change the $products_ids value to put my product ID, but had no luck whatsoever.

I need the PDF to be sent ONLY for one particular product (which ID is 185747).

I’m really confused because your code seems logical to me. Could it be bothered by the fact I rename “Invoice” with the following filter ?
add_filter( 'wpo_wcpdf_filename', 'wpo_wcpdf_custom_filename', 10, 4 );

My new prefix is “carte-cadeau”.

Sorry for double message, just to let you know that changing “invoice” with “carte-cadeau” in your code result in the PDF being send with all product (so basically cancelling the code).

So I don’t think it has anything to do with it. I’m going to try again with invoice and check if I can tweak it myself, but would be super grateful for your help again ??

I have tested the code, and it’s working on my side. You just need to add your product IDs in the $products_ids array. Could you please install and activate temporarily the Code Snippets plugin to test it? Then, you can add it to your child theme’s functions.php file, in the case that you don’t want to use the Code Snippets plugin.

I don’t really see how installing Code Snippets can help ? Would you mind explaining why this would be useful ?

Here is all the code related to the PDFs I have in my functions.php file.
I also made a custom template by following the guidelines in the plugin documentation.

// Change PDF names

add_filter( 'wpo_wcpdf_invoice_title', 'wpo_wcpdf_invoice_title', 10, 2 );
function wpo_wcpdf_invoice_title ( $title, $document ) {
    $title = 'Carte cadeau';
    return $title;
}

add_filter( 'wpo_wcpdf_filename', 'wpo_wcpdf_custom_filename', 10, 4 );
function wpo_wcpdf_custom_filename( $filename, $template_type, $order_ids, $context ) {
    $invoice_string = _n( 'invoice', 'invoices', count($order_ids), 'woocommerce-pdf-invoices-packing-slips' );
    $new_prefix = _n( 'carte-cadeau', 'cartes-cadeaux', count($order_ids), 'woocommerce-pdf-invoices-packing-slips' );
    $new_filename = str_replace($invoice_string, $new_prefix, $filename);
 
    return $new_filename;
}

// Allow PDF only for "cartes cadeaux"

add_filter('wpo_wcpdf_document_is_allowed', function( $allowed, $document ) {
	if ( $document->get_type() == 'invoice' ) {		
		if ( $document->exists() ) {
			return $allowed;
		}
		$allowed = false; // disabled by default
		$products_ids = array(185747); // Enter here all the allowed product IDs
		if ( ! empty( $order = $document->order) && $document->get_type() == 'invoice' ) {
			foreach( $order->get_items() as $item_id => $item ) {
				$product_id = $item['variation_id'] != 0 ? $item['variation_id'] : $item['product_id'];
				if( in_array($product_id, $products_ids) ) {
					$allowed = true; // enable if the product ID match
					break;
				}			
			}
		}
	}	
	return $allowed;
}, 10, 2);

The last part is the exact code you send me, but I changed the ID to the product I want to target.
I just tested it again, and it is defintely not working for me.
It result in no PDF being sent at all, for any product.

The product I’m trying to target is a variable product, if this change anything ?

I use my own custom made WordPress theme made on a _s basis, with very minimal plugin, so I don’t think there could be any incompatibility. Everything is up to date too.

Anything I’m doing wrong ?

I think this improved version of the code snippet do the trick:

/**
 * Enable the invoice for certain products
 */
add_filter('wpo_wcpdf_document_is_allowed', function( $allowed, $document ) {
	if ( $document->get_type() == 'invoice' ) {		
		if ( $document->exists() ) {
			return $allowed;
		}
		$allowed = false; // disabled by default
		$products_ids = array( 185747 ); // Enter here all the allowed product IDs
		if ( $order = $document->order ) {
			foreach( $order->get_items() as $item_id => $item ) {
				if( in_array( absint( $item['variation_id'] ), $products_ids ) || in_array( absint( $item['product_id'] ), $products_ids ) ) {
					$allowed = true; // enable if the product ID match
					break;
				}			
			}
		}
	}	
	return $allowed;
}, 10, 2);

Note that the above code should be tested with new orders that don’t have an invoice yet!

Yes, that work !
Thank you so much ??

I’m glad to hear that it worked now!

If you don’t mind and have the time, do you think you could leave us a review?

Thanks in advance and all the best with your store!