minor fixes + default

aeat.py

@@ -337,7 +337,7 @@ class SIIReport(Workflow, ModelSQL, ModelView):
         return Transaction().context.get('company')
 
     @fields.depends('company')
-    def on_change_with_currency(self, name):
+    def on_change_with_currency(self, name=None):
         if self.company:
             return self.company.currency.id
 
@@ -664,7 +664,7 @@ class BaseTrytonInvoiceMapper(object):
     issue_date = attrgetter('invoice_date')
     invoice_kind = attrgetter('sii_operation_key')
     rectified_invoice_kind = callback_utils.fixed_value('I')
-    not_exempt_kind = attrgetter('sii_subjected')
+    not_exempt_kind = attrgetter('sii_subjected_key')
     counterpart_name = attrgetter('party.name')
     counterpart_nif = attrgetter('party.sii_vat_code')
     counterpart_id_type = attrgetter('party.identifier_type')

invoice.py

@@ -54,6 +54,13 @@ class Invoice:
             'sii_received_key', 'sii_issued_key', 'sii_subjected_key',
             'sii_excemption_key', 'sii_intracomunity_key']
 
+    @staticmethod
+    def default_sii_operation_key():
+        type_ = Transaction().context.get('type', 'out_invoice')
+        if type_ in ('in_credit_note', 'out_credit_note'):
+            return 'R1'
+        return 'F1'
+
     @classmethod
     def search_sii_state(cls, name, clause):
         pool = Pool()