Fix class name 8

rog/services/csv_processor.py

@@ -239,11 +239,20 @@ class EntryCSVProcessor:
             zekken_no = row['zekken_number']
             event = NewEvent2.objects.get(event_name=row['event_code'])
             print(f'イベント取得：{event.event_name}')
+
+            # start_datetimeの検証を追加
+            if not event.start_datetime:
+                raise ValidationError(f"Event {event.event_name} has no start date")
+            
+            # 日付が必要な場合のフォールバック
+            entry_date = event.start_datetime
+            print(f'エントリー日付：{entry_date}')
+
             Entry.objects.create(
                 team=team,
                 event=event,
                 category=team.category,
-                date=event.start_datetime,
+                date=entry_date,
                 owner=owner,
                 zekken_number=zekken_no,
                 is_active=False