more robust race form

rowers/models.py

@@ -1367,8 +1367,14 @@ class VirtualRaceForm(ModelForm):
         course = cd['course']
         geocourse = GeoCourse.objects.get(id=course.id)
         timezone_str = get_course_timezone(geocourse)
-        
+
         start_time = cd['start_time']
+        if start_time is None:
+            raise forms.ValidationError(
+                    'Must have start time',
+                    code='missing_yparam1'
+                    )
+        
         start_date = cd['startdate']
         startdatetime = datetime.datetime.combine(start_date,start_time)
         startdatetime = pytz.timezone(timezone_str).localize(
@@ -1376,6 +1382,12 @@ class VirtualRaceForm(ModelForm):
         )
 
         end_time = cd['end_time']
+        if end_time is None:
+            raise forms.ValidationError(
+                'Must have end time',
+                code='missing endtime'
+                )
+            
         end_date = cd['enddate']
         enddatetime = datetime.datetime.combine(end_date,end_time)
         enddatetime = pytz.timezone(timezone_str).localize(