Merge remote-tracking branch 'origin/master' into fix/435

CHANGELOG

 smasch (1.1.0~alpha.0-1) unstable; urgency=low
 
-  * improvement: warn the user on invalid date range when creating a holidays/extra availability (#427)
+  * improvement: warn the user on invalid date range when creating a
+    holidays/extra availability (#427)
   * improvement: user can modify/add Subject types with custom follow up schema
     (#371)
   * improvement: added week day to daily planning main date (#425)
   * improvement: possibility to import custom fields data from csv file (#385)
+  * improvement: added warning in case of printing voucher with no voucher
+    templates (#451)
   * bug fix: privacy notice files were not removed when policy was removed
   * bug fix: holidays were wrongly encoded and displayed when they span
     multiple days (#430, #429)

smash/web/views/mails.py

@@ -121,6 +121,10 @@ def generate_for_vouchers(request):
             vouchers.append(Voucher.objects.get(pk=int(voucher_id)))
     templates = MailTemplate.get_voucher_mail_templates([])[0]
 
+    if len(templates) == 0:
+        messages.add_message(request, messages.WARNING, 'There are no voucher mail templates. Please add one in order to print vouchers.')
+        return redirect(request.META.get('HTTP_REFERER', 'web.views.subjects'))
+
     output_stream = io.BytesIO()
 
     inputs = []