Hello ,i m trying to print account invoice report from sale order from print menu.

when i try to print it from custom button (print invoice) which i have made in sale order ,by linking sale order and invoice by invoice_ids ,i m getting Invoice report .

But when i try to print it from Print menu,empty report are generating.

Below is the method I'm calling.

    @api.multi

   def invoice_print(self):

        self.ensure_one()

        self.sent = True

        return self.env['report'].get_action(self, 'account.report_invoice')

when i m calling this method from my button it is generating report.

But when i m trying to call this method from print menu in Sale order by

<report

            id="some_unique_name"

            string=" Invoice"

            model="sale.order"

            report_type="qweb-pdf"

            file="module.report_sale_invoice"

            name="module.report_sale_invoice"/>

<template id="report_sale_invoice">

        <t t-call="report.html_container">

            <t t-foreach="docs" t-as="doc">

               <t t-esc="doc.invoice_ids.invoice_print()"/>  

            </t>

        </t>

    </template>