[IMP] account: display payment amount in its own currency

The payment widget now displays the payment in its currency, not in the
currency of the invoice.

opw-652747

addons/account/models/account_invoice.py

@@ -137,28 +137,29 @@ class AccountInvoice(models.Model):
         if self.payment_move_line_ids:
             info = {'title': _('Less Payment'), 'outstanding': False, 'content': []}
             for payment in self.payment_move_line_ids:
+                #we don't take into account the movement created due to a change difference
+                if payment.currency_id and payment.move_id.rate_diff_partial_rec_id:
+                    continue
                 if self.type in ('out_invoice', 'in_refund'):
                     amount = sum([p.amount for p in payment.matched_debit_ids if p.debit_move_id in self.move_id.line_ids])
                     amount_currency = sum([p.amount_currency for p in payment.matched_debit_ids if p.debit_move_id in self.move_id.line_ids])
                 elif self.type in ('in_invoice', 'out_refund'):
                     amount = sum([p.amount for p in payment.matched_credit_ids if p.credit_move_id in self.move_id.line_ids])
                     amount_currency = sum([p.amount_currency for p in payment.matched_credit_ids if p.credit_move_id in self.move_id.line_ids])
-                #we don't take into account the movement created due to a change difference
-                if payment.currency_id and payment.move_id.rate_diff_partial_rec_id:
-                    continue
                 # get the payment value in invoice currency
                 if payment.currency_id and amount_currency != 0:
+                    currency_id = payment.currency_id
                     amount_to_show = -amount_currency
                 else:
-                    self.with_context(date=payment.date)
-                    amount_to_show = payment.company_id.currency_id.compute(-amount, self.currency_id)
+                    currency_id = payment.company_id.currency_id
+                    amount_to_show = -amount
                 info['content'].append({
                     'name': payment.name,
                     'journal_name': payment.journal_id.name,
                     'amount': amount_to_show,
-                    'currency': self.currency_id.symbol,
-                    'digits': [69, self.currency_id.decimal_places],
-                    'position': self.currency_id.position,
+                    'currency': currency_id.symbol,
+                    'digits': [69, currency_id.decimal_places],
+                    'position': currency_id.position,
                     'date': payment.date,
                     'payment_id': payment.id,
                     'move_id': payment.move_id.id,