Bug/kit request mail crash

Closes #259 (closed)

smash/web/views/kit.py

@@ -110,8 +110,11 @@ def send_mail(data):
         email_body += "<tr style='" + row_style + "'>"
         email_body += "<td style='" + cell_style + "'>" + \
             appointment.datetime_when.strftime('%Y-%m-%d %H:%M') + "</td>"
-        email_body += "<td style='" + cell_style + "'>" + \
-            appointment.visit.subject.nd_number + "</td>"
+        if appointment.visit is not None and appointment.visit.subject is not None:
+            email_body += "<td style='" + cell_style + "'>" + \
+                appointment.visit.subject.nd_number + "</td>"
+        else:
+            email_body += "<td style='" + cell_style + "'>" + '-' + "</td>"
         email_body += "<td style='" + cell_style + "'>"
         for type in appointment.appointment_types.all():
             for item in type.required_equipment.all():