[GIT-221] fix(cycle): guard against no end_date when archiving cycle (#9200)

Author: Rahulcheryala

apps/api/plane/api/views/cycle.py

@@ -813,7 +813,7 @@ def post(self, request, slug, project_id, cycle_id):
         Only cycles that have ended can be archived.
         """
         cycle = Cycle.objects.get(pk=cycle_id, project_id=project_id, workspace__slug=slug)
-        if cycle.end_date >= timezone.now():
+        if cycle.end_date is None or cycle.end_date >= timezone.now():
             return Response(
                 {"error": "Only completed cycles can be archived"},
                 status=status.HTTP_400_BAD_REQUEST,

apps/api/plane/app/views/cycle/archive.py

@@ -587,7 +587,7 @@ def get(self, request, slug, project_id, pk=None):
     def post(self, request, slug, project_id, cycle_id):
         cycle = Cycle.objects.get(pk=cycle_id, project_id=project_id, workspace__slug=slug)
 
-        if cycle.end_date >= timezone.now():
+        if cycle.end_date is None or cycle.end_date >= timezone.now():
             return Response(
                 {"error": "Only completed cycles can be archived"},
                 status=status.HTTP_400_BAD_REQUEST,