[FIX] fix sale_order_ubl after reporting engine improvement #919275ed…

…ef5f5e206954cc6159217dc4e4cdfd67

sale_order_ubl/models/report.py

@@ -8,16 +8,17 @@ class IrActionsReport(models.Model):
     _inherit = "ir.actions.report"
 
     @api.multi
-    def render_qweb_pdf(self, res_ids=None, data=None):
+    def _post_pdf(self, save_in_attachment, pdf_content=None, res_ids=None):
         """We go through that method when the PDF is generated for the 1st
         time and also when it is read from the attachment.
         This method is specific to QWeb"""
-        pdf_content = super().render_qweb_pdf(res_ids, data)
         if (
                 len(self) == 1 and
                 self.report_name == 'sale.report_saleorder' and
+                res_ids and
                 len(res_ids) == 1 and
                 not self._context.get('no_embedded_ubl_xml')):
             order = self.env['sale.order'].browse(res_ids[0])
             pdf_content = order.embed_ubl_xml_in_pdf(pdf_content=pdf_content)
-        return pdf_content
+        return super()._post_pdf(
+            save_in_attachment, pdf_content=pdf_content, res_ids=res_ids)