1.0.0初始化源代码

backend/app/models/base.py

@@ -0,0 +1,49 @@
+"""
+数据库基础配置
+"""
+from sqlalchemy import create_engine
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from contextlib import contextmanager
+import logging
+
+from app.core.config import settings
+
+logger = logging.getLogger(__name__)
+
+# 创建数据库引擎
+engine = create_engine(
+    settings.get_database_url,
+    pool_pre_ping=True,
+    pool_size=20,
+    max_overflow=40,
+    echo=settings.DEBUG,
+)
+
+# 创建会话工厂
+SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
+
+# 创建基类
+Base = declarative_base()
+
+
+@contextmanager
+def get_db():
+    """获取数据库会话的上下文管理器"""
+    db = SessionLocal()
+    try:
+        yield db
+        db.commit()
+    except Exception as e:
+        db.rollback()
+        logger.error(f"Database error: {e}")
+        raise
+    finally:
+        db.close()
+
+
+def init_db():
+    """初始化数据库表"""
+    from . import virtual_user, interaction, token_usage, system_config, ai_model, news_cache
+    Base.metadata.create_all(bind=engine)
+    logger.info("Database tables created successfully")