line: valid handling of 2nd-currency + test

line.py

@@ -251,17 +251,17 @@ class Line(Workflow, ModelSQL, ModelView):
                     ))
             # in case of 'mvin' or 'mvout' - create counterpart
             if (line.bookingtype in ['mvout', 'mvin']) and (line.reference is None):
-                to_create_line.append({
+                values = {
                     'cashbook': line.booktransf.id,
                     'bookingtype': 'mvin' if line.bookingtype == 'mvout' else 'mvout',
                     'date': line.date,
                     'description': line.description,
-                    'amount': line.amount,
-                    'credit': line.debit,
-                    'debit': line.credit,
                     'booktransf': line.cashbook.id,
                     'reference': line.id,
-                    })
+                    }
+                values.update(line.get_amount_by_second_currency(line.booktransf.currency))
+                values.update(cls.get_debit_credit(values))
+                to_create_line.append(values)
 
             # add number to line
             if line.cashbook.number_atcheck == True:
@@ -342,6 +342,26 @@ class Line(Workflow, ModelSQL, ModelView):
             'type': gettext('cashbook.msg_line_bookingtype_%s' % self.bookingtype),
             }
 
+    def get_amount_by_second_currency(self, to_currency):
+        """ get amount, calculate credit/debit from currency of current
+            cashbook to 'to_currency'
+        """
+        Currency = Pool().get('currency.currency')
+
+        values = {
+            'amount': self.amount,
+            }
+
+        if to_currency.id != self.cashbook.currency.id:
+            with Transaction().set_context({
+                'date': self.date,
+                }):
+                values['amount'] = Currency.compute(
+                        self.cashbook.currency,
+                        self.amount,
+                        to_currency)
+        return values
+
     @staticmethod
     def order_state(tables):
         """ edit = 0, check/done = 1