Merge pull request #1992 from gtech-mulearn/dev

update annotate total karma in launchpad leaderboard

api/launchpad/launchpad_views.py

@@ -1,46 +1,29 @@
-from django.db.models import (
-    Sum,
-    Max,
-    Prefetch,
-    When,
-    Case,
-    IntegerField,
-    CharField,
-    F,
-    OuterRef,
-    Subquery,
-)
-from django.db.models.functions import Coalesce
+from django.db.models import Q, Sum, Max
 
 from rest_framework.views import APIView
 
 from .serializers import LaunchpadLeaderBoardSerializer
 from utils.response import CustomResponse
 from utils.utils import CommonUtils
 from db.user import User
-from db.organization import Organization, District, State
-from db.task import KarmaActivityLog
 
 
 class Leaderboard(APIView):
     def get(self, request):
-        karma_subquery = (
-            KarmaActivityLog.objects.filter(
-                user=OuterRef("id"),
-                task__event="launchpad",
-                appraiser_approved=True,
-            )
-            .annotate(total_karma=Sum("karma"))
-            .values("total_karma")
-        )
         users = (
             User.objects.filter(
                 karma_activity_log_user__task__event="launchpad",
                 karma_activity_log_user__appraiser_approved=True,
                 karma_activity_log_user__task__hashtag="#lp24-introduction",
             )
             .annotate(
-                karma=Subquery(karma_subquery, output_field=IntegerField()),
+                karma=Sum(
+                    "karma_activity_log_user__karma",
+                    filter=Q(
+                        karma_activity_log_user__task__event="launchpad",
+                        karma_activity_log_user__appraiser_approved=True,
+                    ),
+                ),
                 time_=Max("karma_activity_log_user__created_at"),
             )
             .order_by("-karma", "time_")