some minor fixes

backend/app/models.py

@@ -29,6 +29,7 @@ class Meal(models.Model):
     class Meta:
         verbose_name = _('Danie')
         verbose_name_plural = _('Dania')
+        ordering = ['name',]
 
 
 class Order(models.Model):

backend/backend/urls.py

@@ -55,6 +55,8 @@ class MealSerializer(serializers.ModelSerializer):
 class MealViewSet(viewsets.ModelViewSet):
     queryset = Meal.objects.all()
     serializer_class = MealSerializer
+    filter_backends = [filters.OrderingFilter]
+    ordering = ['name']
 
 
 class OrderSerializer(serializers.ModelSerializer):
@@ -88,9 +90,9 @@ class OrderViewSet(viewsets.ModelViewSet):
     ordering = ['-created_on']
 
     def get_queryset(self):
-        five_minutes_ago = timezone.now() + datetime.timedelta(minutes=-5)
+        five_minutes_ago = timezone.now() + datetime.timedelta(minutes=-15)
         return Order.objects.filter(
-            ~Q(status=Order.StatusChoices.FINALIZED)
+            ~Q(status__gte=Order.StatusChoices.READY)
             | Q(updated_on__gte=five_minutes_ago)
         )