fix: simplify comparisons

program/views.py

@@ -1138,7 +1138,8 @@ class APIScheduleViewSet(viewsets.ModelViewSet):
             schedule = self.get_object()
 
             default_playlist_id = request.data.get("schedule").get("default_playlist_id")
-            if default_playlist_id == "" or default_playlist_id is None:
+
+            if default_playlist_id == "":
                 # "clear" the default_playlist_id if the field has no value
                 schedule.default_playlist_id = None
             else:
@@ -1151,7 +1152,7 @@ class APIScheduleViewSet(viewsets.ModelViewSet):
                 schedule.is_repetition = False
 
             last_date = request.data.get("schedule").get("last_date")
-            if last_date == "" or last_date is None:
+            if last_date == "":
                 # "clear" the last_date if the field has no value
                 schedule.last_date = None
             else: