voucher model modified

Voucher number follow naming schema: {ND_NUMBER}-{DATE}-{VOUCHER_TYPE_CODE}-{VOUCHER_PARTNER_CODE}-{SEQ_NUMBER}{CHECKSUM}

Single voucher is issued for some hours to be used. These hours can be used in few sessions by corresponding voucher partner.

Closes #211 (closed)

smash/web/forms/voucher_forms.py

@@ -8,7 +8,7 @@ from django.utils import timezone
 from web.algorithm import VerhoeffAlgorithm
 from web.forms.forms import DATEPICKER_DATE_ATTRS
 from web.models import VoucherType, VoucherTypePrice, Voucher, Worker
-from web.models.constants import VOUCHER_STATUS_NEW, VOUCHER_STATUS_USED, VOUCHER_STATUS_EXPIRED
+from web.models.constants import VOUCHER_STATUS_USED, VOUCHER_STATUS_EXPIRED
 from web.models.worker_study_role import WORKER_VOUCHER_PARTNER
 
 logger = logging.getLogger(__name__)
@@ -58,7 +58,7 @@ class VoucherForm(ModelForm):
             self.fields['hours'].widget.attrs['readonly'] = True
             self.fields['usage_partner'].widget.attrs['readonly'] = True
 
-            if instance.status == VOUCHER_STATUS_USED or instance.status == VOUCHER_STATUS_EXPIRED:
+            if instance.status in [VOUCHER_STATUS_USED, VOUCHER_STATUS_EXPIRED]:
                 self.fields['status'].widget.attrs['readonly'] = True
                 self.fields['feedback'].widget.attrs['readonly'] = True