Catch an KyuDanRanking.DoesNotExist exception if the user has never played a game of mahjongg by now.

src/mahjong_ranking/views.py

@@ -31,6 +31,18 @@ KYU_DAN_ORDER = {  # map sort URL args to Django ORM order_by args
 }
 
 
+def get_kyu_dan_ranking(user=None):
+    """
+    get the KyuDanRanking from the Database, or return a blank one
+    :param user: user model
+    :return: KyuDanRanking object
+    """
+    try:
+        return models.KyuDanRanking.objects.get(user=user)
+    except models.KyuDanRanking.DoesNotExist:
+        return models.KyuDanRanking(user=user)
+
+
 class DeleteHanchan(EventDetailMixin, PermissionRequiredMixin,
                     generic.DeleteView):
     """Deletes a Hanchan if confimration has been answerd with 'yes'."""
@@ -206,7 +218,6 @@ class PlayerScore(LoginRequiredMixin, generic.ListView):
             raise django.http.Http404(
                 _("No user found matching the name {}").format(
                     self.kwargs.get('username')))
-        print(request.GET)
         if request.GET.get('download') == 'xlsx':
             return self.get_xlsx(request, *args, **kwargs)
         return super(PlayerScore, self).get(request, *args, **kwargs)
@@ -248,7 +259,7 @@ class PlayerDanScore(PlayerScore):
     template_name = 'mahjong_ranking/player_dan_score.html'
 
     def get_queryset(self):
-        self.kyu_dan_ranking = models.KyuDanRanking.objects.get(user=self.user)
+        self.kyu_dan_ranking = get_kyu_dan_ranking(user=self.user)
         return models.Hanchan.objects.dan_hanchans(
             user=self.user,
             since=self.kyu_dan_ranking.legacy_date)
@@ -304,7 +315,7 @@ class PlayerKyuScore(PlayerScore):
     template_name = 'mahjong_ranking/player_kyu_score.html'
 
     def get_queryset(self):
-        self.kyu_dan_ranking = models.KyuDanRanking.objects.get(user=self.user)
+        self.kyu_dan_ranking = get_kyu_dan_ranking(user=self.user)
         return models.Hanchan.objects.kyu_hanchans(
             user=self.user,
             since=self.kyu_dan_ranking.legacy_date)