fix: get correct fields from schedule object

program/views.py

@@ -1116,23 +1116,27 @@ class APIScheduleViewSet(viewsets.ModelViewSet):
             # only these fields can be updated without generating conflicts
             allowed = {"default_playlist_id", "is_repetition", "last_date"}
 
-            if set(request.data["schedule"].keys()).issubset(allowed):
+            if set(request.data.get("schedule").keys()).issubset(allowed):
                 schedule = self.get_object()
 
-                if default_playlist_id := request.data.get("default_playlist_id"):
-                    if default_playlist_id == "":
-                        # "clear" the default_playlist_id if the field has no value
-                        schedule.default_playlist_id = None
-                    else:
-                        schedule.default_playlist_id = int(default_playlist_id)
-
-                if is_repetition := request.data.get("is_repetition"):
-                    if is_repetition == "true" or is_repetition == "1":
-                        schedule.is_repetition = True
-                    if is_repetition == "false" or is_repetition == "0":
-                        schedule.is_repetition = False
-
-                if last_date := request.data.get("last_date"):
+                default_playlist_id = request.data.get("schedule").get("default_playlist_id")
+                if default_playlist_id == "" or default_playlist_id is None:
+                    # "clear" the default_playlist_id if the field has no value
+                    schedule.default_playlist_id = None
+                else:
+                    schedule.default_playlist_id = int(default_playlist_id)
+
+                is_repetition = request.data.get("schedule").get("is_repetition")
+                if is_repetition == "true" or is_repetition == "1":
+                    schedule.is_repetition = True
+                if is_repetition == "false" or is_repetition == "0":
+                    schedule.is_repetition = False
+
+                last_date = request.data.get("schedule").get("last_date")
+                if last_date == "" or last_date is None:
+                    # "clear" the last_date if the field has no value
+                    schedule.last_date = None
+                else:
                     last_date = date.fromisoformat(last_date)
 
                     if schedule.last_date is None or schedule.last_date > last_date: