98 lines
3.5 KiB
Python
98 lines
3.5 KiB
Python
"""
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AI对话系统 - 数据库模型
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"""
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from sqlalchemy import create_engine, Column, Integer, String, Text, Boolean, DateTime, ForeignKey, JSON
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.orm import sessionmaker, relationship
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from datetime import datetime
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import os
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DATABASE_URL = os.environ.get('DATABASE_URL', 'sqlite:///./ai_chat.db')
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engine = create_engine(DATABASE_URL, connect_args={"check_same_thread": False})
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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Base = declarative_base()
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class User(Base):
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"""用户表 - 支持网页用户和Matrix用户"""
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__tablename__ = 'users'
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id = Column(Integer, primary_key=True, index=True)
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user_id = Column(String(100), unique=True, index=True) # 唯一标识：web_xxx 或 @xxx:matrix.org
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display_name = Column(String(100))
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user_type = Column(String(20), default='web') # web 或 matrix
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matrix_user_id = Column(String(200), nullable=True) # Matrix用户ID
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created_at = Column(DateTime, default=datetime.utcnow)
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last_active_at = Column(DateTime, default=datetime.utcnow)
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is_active = Column(Boolean, default=True)
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conversations = relationship("Conversation", back_populates="user")
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class Conversation(Base):
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"""对话会话"""
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__tablename__ = 'conversations'
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id = Column(Integer, primary_key=True, index=True)
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conversation_id = Column(String(100), unique=True, index=True) # 会话唯一标识
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user_id = Column(Integer, ForeignKey('users.id'))
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title = Column(String(200), nullable=True)
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created_at = Column(DateTime, default=datetime.utcnow)
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updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
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is_active = Column(Boolean, default=True)
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extra_data = Column(JSON, nullable=True) # 额外元数据
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user = relationship("User", back_populates="conversations")
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messages = relationship("Message", back_populates="conversation")
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class Message(Base):
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"""消息表"""
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__tablename__ = 'messages'
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id = Column(Integer, primary_key=True, index=True)
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conversation_id = Column(Integer, ForeignKey('conversations.id'))
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role = Column(String(20)) # user, assistant, system
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content = Column(Text)
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source = Column(String(20)) # web, matrix
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created_at = Column(DateTime, default=datetime.utcnow)
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extra_data = Column(JSON, nullable=True) # 额外元数据（如Matrix event_id）
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conversation = relationship("Conversation", back_populates="messages")
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class SystemConfig(Base):
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"""系统配置表"""
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__tablename__ = 'system_config'
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id = Column(Integer, primary_key=True, index=True)
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key = Column(String(100), unique=True, index=True)
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value = Column(Text)
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description = Column(String(500))
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updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
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class MatrixRoomMapping(Base):
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"""Matrix房间映射 - 绑定房间到用户会话"""
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__tablename__ = 'matrix_room_mapping'
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id = Column(Integer, primary_key=True, index=True)
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room_id = Column(String(200), unique=True, index=True) # Matrix房间ID
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user_id = Column(Integer, ForeignKey('users.id'))
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conversation_id = Column(Integer, ForeignKey('conversations.id'))
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created_at = Column(DateTime, default=datetime.utcnow)
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def init_db():
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"""初始化数据库"""
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Base.metadata.create_all(bind=engine)
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def get_db():
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"""获取数据库会话"""
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close() |