leaderboard ranking

web_admin/views/analytics.py

@@ -7,12 +7,16 @@ from rest_framework.viewsets import GenericViewSet
 from rest_framework.decorators import action
 from django.contrib.auth import get_user_model
 from django.db.models import Q
-from django.db.models import Count
+from django.db.models import Count, OuterRef, Subquery, Sum
 from django.db.models.functions import TruncDate
+from django.db.models import F, Window
+from django.db.models.functions.window import Rank
 
 from account.utils import custom_response
 from base.constants import PENDING, IN_PROGRESS, REJECTED, REQUESTED, COMPLETED, EXPIRED
 from guardian.models import JuniorTask
+from junior.models import JuniorPoints
+from web_admin.serializers.analytics_serializer import LeaderboardSerializer
 
 USER = get_user_model()
 
@@ -59,7 +63,11 @@ class AnalyticsViewSet(GenericViewSet):
 
     @action(methods=['get'], url_name='new-signups', url_path='new-signups', detail=False)
     def new_signups(self, request, *args, **kwargs):
-
+        """
+        api method to get new signups
+        :param request: query params {start_date and end_date}, date format (yyyy-mm-dd)
+        :return:
+        """
         end_date = datetime.date.today()
         start_date = end_date - datetime.timedelta(days=6)
 
@@ -76,7 +84,11 @@ class AnalyticsViewSet(GenericViewSet):
 
     @action(methods=['get'], url_name='assign-tasks', url_path='assign-tasks', detail=False)
     def assign_tasks_report(self, request, *args, **kwargs):
-
+        """
+        api method to get assign tasks
+        :param request: query params {start_date and end_date}, date format (yyyy-mm-dd)
+        :return:
+        """
         end_date = datetime.date.today()
         start_date = end_date - datetime.timedelta(days=6)
 
@@ -96,3 +108,21 @@ class AnalyticsViewSet(GenericViewSet):
         }
 
         return custom_response(None, data)
+
+    @action(methods=['get'], url_name='junior-leaderboard', url_path='junior-leaderboard', detail=False,
+            serializer_class=LeaderboardSerializer)
+    def junior_leaderboard(self, request):
+        """
+
+        :param request:
+        :return:
+        """
+        # queryset = JuniorPoints.objects.all().order_by('-total_points', 'junior__created_at')
+        queryset = JuniorPoints.objects.prefetch_related('junior', 'junior__auth').annotate(rank=Window(
+            expression=Rank(),
+            order_by=[F('total_points').desc(), 'junior__created_at']
+        )).order_by('-total_points', 'junior__created_at')
+        paginator = self.pagination_class()
+        paginated_queryset = paginator.paginate_queryset(queryset, request)
+        serializer = self.serializer_class(paginated_queryset, many=True)
+        return custom_response(None, serializer.data)