调整主题和提取时间，更新最新时间

message_storage/message_to_db.py

@@ -49,16 +49,15 @@ def get_messages(group_id, all_contacts: dict):
         # 生成Redis key
         key = f"{group_id}:summary_time"
         last_summary_time = r.get(key)
+        current_time = datetime.now()
+        current_date = current_time.strftime('%Y-%m-%d %H:%M:%S')
         if last_summary_time is None:
             # 获取当前时间并计算8小时前的时间
-            current_time = datetime.now()
             eight_hours_ago = current_time - timedelta(hours=8)
 
             # 转换为数据库中存储的时间格式 (假设timestamp是DATETIME类型)
             last_summary_time = eight_hours_ago.strftime('%Y-%m-%d %H:%M:%S')
-            current_date = current_time.strftime('%Y-%m-%d %H:%M:%S')
-            r.set(key, current_date)
-
+        r.set(key, current_date)
         with connection.cursor() as cursor:
 
             # 执行查询，获取最近8小时的消息