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session_message.py2.77 kB
# Copyright (c) 2023 Baidu, Inc. All Rights Reserved. # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. import datetime import uuid db = None def get_db_base_class(): try: from sqlalchemy.orm import declarative_base except ImportError as e: raise ImportError("Please install SQLAlchemy first: python3 -m pip install SQLAlchemy==2.0.31") global db if not db: db = declarative_base() return db class SessionMessage(get_db_base_class()): """ 会话 Message 数据模型,用于在数据库中存储和管理会话消息。 以下是每个字段的注释: __tablename__:数据库表名为 appbuilder_session_messages,这是该类对应的数据库表名。 id:主键字段,使用UUID作为默认值,确保每条记录的唯一性。 session_id:会话ID字段,不允许为空,用于标识会话。 request_id:请求ID字段,不允许为空,用于标识请求。 message_key:Message 键字段,不允许为空,用于标识 Message 的关键字。 message_value:Message 值字段,不允许为空,用于存储 Message 的具体内容,使用JSON格式存储。 created_at:创建时间字段,使用当前时间作为默认值,不允许为空。 updated_at:更新时间字段,使用当前时间作为默认值,不允许为空。 deleted:删除标记字段,使用False作为默认值,不允许为空。当该字段为True时,表示该条记录已被删除。 """ from sqlalchemy import create_engine, Column, Integer, String, JSON, DateTime, Boolean __tablename__ = 'appbuilder_session_messages' id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()), unique=True) session_id = Column(String(36), nullable=False) request_id = Column(String(36), nullable=False) message_key = Column(String(128), nullable=False) message_value = Column(JSON, nullable=False) created_at = Column(DateTime, default=datetime.datetime.now, nullable=False) updated_at = Column(DateTime, default=datetime.datetime.now, nullable=False) deleted = Column(Boolean, default=False, nullable=False)

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