refactor: add annotations in queryset to return sub_issues_count and total members in workspace (#185)

* refactor: add anotations in queryset to return sub_issues_count

* refactor: add sub issue count in modules cycles and my issues endpoint

apiserver/plane/api/views/workspace.py

@@ -10,7 +10,7 @@ from django.utils import timezone
 from django.core.exceptions import ValidationError
 from django.core.validators import validate_email
 from django.contrib.sites.shortcuts import get_current_site
-from django.db.models import CharField, Count
+from django.db.models import CharField, Count, OuterRef, Func, F
 from django.db.models.functions import Cast
 
 # Third party modules
@@ -111,6 +111,14 @@ class UserWorkSpacesEndpoint(BaseAPIView):
 
     def get(self, request):
         try:
+
+            member_count = (
+                WorkspaceMember.objects.filter(workspace=OuterRef("id"))
+                .order_by()
+                .annotate(count=Func(F("id"), function="Count"))
+                .values("count")
+            )
+
             workspace = (
                 Workspace.objects.prefetch_related(
                     Prefetch("workspace_member", queryset=WorkspaceMember.objects.all())
@@ -119,7 +127,7 @@ class UserWorkSpacesEndpoint(BaseAPIView):
                     workspace_member__member=request.user,
                 )
                 .select_related("owner")
-            ).annotate(total_members=Count("workspace_member"))
+            ).annotate(total_members=member_count)
 
             serializer = WorkSpaceSerializer(self.filter_queryset(workspace), many=True)
             return Response(serializer.data, status=status.HTTP_200_OK)