Product/Service Related merge fields in an Invoice email template

[unrealindeed]

Hi All,

Our billing team would find it very helpful to have some Product/Service Related merge fields available in some invoice templates (Invoice created, First, Second & Third invoice overdue notice).

After some testing and head scratching I realised some merge fields are not available in certain templates. Product/Service Related merge fields are not available in Invoice templates, is there any possible way to include say $service_id in an invoice template?

Thank you in advance for any help,

[unrealindeed]

Does anyone know if it's possible to display merge fields from Product/Service Messages in an Invoice Message email template?

We'd like to display {$service_id}  on Invoice messages and reminders for our customers.

Thank you

[unrealindeed]

UPDATE: Finally...

There appears to be a $relid data item available within the $invoice_items array that can be used to display service ID with 'Invoice' related email templates in WHMCS, since {$service_id} tag is only available in 'Product/Service' email templates.

Code below if anyone needs it, though I am still unsure how to print a complete list of items available within the $invoice_items array. I tried adding {debug} to an email template and sending the message but nothing displayed in the email.

{if $invoice_items}
    {foreach from=$invoice_items item=data}
        Service Subscription ID: {$data.relid}
    {/foreach}
{/if}

Hope this helps somebody!