How to generate the PDF

[tapas4git]

Hi,

I have installed your app in django 1.11 . Adding invoice is a long form . after adding I need to generate the pdf and sent it back to the User email. How can I connect it with my user purchase table.
I am also getting follwing error while adding a new invoice.

(1064, "You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'numeric), 2) as vat from invoicing_items where invoice_id = 1 group by tax_rate' at line 1")

Kindly reply me with a urgent basis.