初始化鸿蒙应用展示平台项目 - 前后端分离架构

backend/app/database.py

@@ -0,0 +1,27 @@
+from sqlalchemy.ext.asyncio import create_async_engine, AsyncSession
+from sqlalchemy.ext.declarative import declarative_base
+from sqlalchemy.orm import sessionmaker
+from app.config import settings
+
+engine = create_async_engine(
+    settings.database_url,
+    echo=settings.DEBUG,
+    pool_size=10,
+    max_overflow=20,
+    pool_pre_ping=True
+)
+
+AsyncSessionLocal = sessionmaker(
+    engine,
+    class_=AsyncSession,
+    expire_on_commit=False
+)
+
+Base = declarative_base()
+
+async def get_db():
+    async with AsyncSessionLocal() as session:
+        try:
+            yield session
+        finally:
+            await session.close()