Add deductible rate of taxes to supplier invoice

issue6911
review341801002

purchase.py

@@ -1527,6 +1527,11 @@ class Line(sequence_ordered(), ModelSQL, ModelView):
         invoice_line.product = self.product
         invoice_line.unit_price = self.unit_price
         invoice_line.taxes = self.taxes
+        if self.company.purchase_taxes_expense:
+            invoice_line.taxes_deductible_rate = 0
+        elif self.product:
+            invoice_line.taxes_deductible_rate = (
+                self.product.supplier_taxes_deductible_rate_used)
         invoice_line.invoice_type = 'in'
         invoice_line.currency = self.currency
         invoice_line.company = self.company

tests/scenario_purchase.rst

@@ -188,6 +188,8 @@ Purchase 5 products::
     >>> invoice, = purchase.invoices
     >>> invoice.origins == purchase.rec_name
     True
+    >>> invoice.untaxed_amount, invoice.tax_amount, invoice.total_amount
+    (Decimal('25.00'), Decimal('2.50'), Decimal('27.50'))
 
 Invoice line must be linked to stock move::