From 03b10b4666d02ea04106b6f7b5d6987225df7e84 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?C=C3=A9dric=20Krier?= <ced@b2ck.com>
Date: Wed, 26 May 2021 23:52:30 +0200
Subject: [PATCH] Use 1 as value when taxes_deductible_rate is None

issue10453
review353561002
(grafted from cfe4f7653a5b553c174c3bf426579fe32cb2d51a)

--HG--
branch : 6.0
---
 invoice.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/invoice.py b/invoice.py
index 87d625853f..ffb231f634 100644
--- a/invoice.py
+++ b/invoice.py
@@ -2022,7 +2022,9 @@ class InvoiceLine(sequence_ordered(), ModelSQL, ModelView, TaxableMixin):
                 * (self.unit_price or Decimal('0.0')))
             invoice_type = (
                 self.invoice.type if self.invoice else self.invoice_type)
-            if invoice_type == 'in' and self.taxes_deductible_rate != 1:
+            if (invoice_type == 'in'
+                    and self.taxes_deductible_rate is not None
+                    and self.taxes_deductible_rate != 1):
                 with Transaction().set_context(_deductible_rate=1):
                     tax_amount = sum(
                         t['amount'] for t in self._get_taxes().values())
@@ -2075,6 +2077,8 @@ class InvoiceLine(sequence_ordered(), ModelSQL, ModelView, TaxableMixin):
                 deductible_rate = context['_deductible_rate']
             else:
                 deductible_rate = getattr(self, 'taxes_deductible_rate', 1)
+            if deductible_rate is None:
+                deductible_rate = 1
             if not deductible_rate:
                 return []
         else: