8b4b7c230c
- 实现对话线程的附件上传、列出和删除功能 - 引入附件中间件以支持附件内容的上下文注入 - 更新智能体和对话管理器以处理附件元数据 - 增强前端组件以支持文件上传和显示附件状态 - 优化文档以反映新功能和使用示例
118 lines
3.7 KiB
Python
118 lines
3.7 KiB
Python
import json
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import os
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import pathlib
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from contextlib import contextmanager
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from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker
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from server.utils.singleton import SingletonMeta
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from src import config
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from src.storage.db.models import Base, User
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from src.utils import logger
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try:
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from server.utils.migrate import DatabaseMigrator, validate_database_schema
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except ImportError:
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DatabaseMigrator = None
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# 如果迁移工具不存在，使用简单的占位函数
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def validate_database_schema(db_path):
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return True, []
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# TODO:[优化建议]需要将数据库修改为异步的aiosqlite或者异步mysql，缓存使用Redis存储
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# TODO:[已完成]为DBManager添加单例模式
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class DBManager(metaclass=SingletonMeta):
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"""数据库管理器 - 只提供基础的数据库连接和会话管理"""
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def __init__(self):
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self.db_path = os.path.join(config.save_dir, "database", "server.db")
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self.ensure_db_dir()
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# 创建SQLAlchemy引擎，配置JSON序列化器以支持中文
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# 使用 ensure_ascii=False 确保中文字符不被转义为 Unicode 序列
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self.engine = create_engine(
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f"sqlite:///{self.db_path}",
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json_serializer=lambda obj: json.dumps(obj, ensure_ascii=False),
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json_deserializer=json.loads,
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)
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# 创建会话工厂
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self.Session = sessionmaker(bind=self.engine)
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# 首先创建基本表结构
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self.create_tables()
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# 然后检查并执行数据库迁移
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self.run_migrations()
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def ensure_db_dir(self):
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"""确保数据库目录存在"""
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db_dir = os.path.dirname(self.db_path)
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pathlib.Path(db_dir).mkdir(parents=True, exist_ok=True)
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def create_tables(self):
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"""创建数据库表"""
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# 确保所有表都会被创建
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Base.metadata.create_all(self.engine)
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logger.info("Database tables created/checked")
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def run_migrations(self):
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"""运行数据库迁移"""
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if not os.path.exists(self.db_path):
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return
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if DatabaseMigrator is not None:
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migrator = DatabaseMigrator(self.db_path)
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try:
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migrator.run_migrations()
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except Exception as exc:
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logger.error(f"数据库迁移执行失败: {exc}")
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else:
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logger.warning("数据库迁移工具缺失，无法自动执行迁移")
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is_valid, issues = validate_database_schema(self.db_path)
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if not is_valid:
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logger.warning("=" * 60)
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logger.warning("检测到数据库结构与当前模型不一致！")
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logger.warning("=" * 60)
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for issue in issues:
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logger.warning(f" ⚠️ {issue}")
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logger.warning("")
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logger.warning("请运行 scripts/migrate_user_soft_delete.py 手动修复数据库结构")
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logger.warning("=" * 60)
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def get_session(self):
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"""获取数据库会话"""
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return self.Session()
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@contextmanager
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def get_session_context(self):
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"""获取数据库会话的上下文管理器"""
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session = self.Session()
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try:
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yield session
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session.commit()
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except Exception as e:
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session.rollback()
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logger.error(f"Database operation failed: {e}")
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raise
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finally:
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session.close()
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def check_first_run(self):
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"""检查是否首次运行"""
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session = self.get_session()
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try:
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# 检查是否有任何用户存在
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return session.query(User).count() == 0
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finally:
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session.close()
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# 创建全局数据库管理器实例
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db_manager = DBManager()
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