I am trying to list all products from a sales order into an email template;

in Purchasing this is working:

% for purchase_order_line in object.order_line:

  <li>

    ${purchase_order_line.product_id.name} - QTY: ${purchase_order_line.product_qty}

  </li>

% endfor

1. however I cannot find the correct placeholder for a sales order?

2. is there a way to format this NOT as a list but join with "," in the text

3. is there a way to only show the first x=3 order lines?

4. is there a way to not show shipping products?

Any guidance start point is greatly appreciated!

Tobias