重构第一版：重新验证2.0推荐写法

debug/orm_app/session_app.py

@@ -0,0 +1,28 @@
+from sqlalchemy import Column, Integer,create_engine
+
+from sqlalchemy.ext.asyncio import create_async_engine, async_sessionmaker, AsyncSession
+from sqlalchemy.orm import sessionmaker,declarative_base,DeclarativeBase
+
+from fastapi import APIRouter, Depends
+from debug.orm_app.sqlalchemy_full_app import User
+
+
+db_url = "mysql+pymysql://geeker:geeker@localhost:3306/fastapi_tutor?charset=utf8mb4"
+
+engine = create_engine(db_url)
+
+# 测试autoflush - True
+session = sessionmaker(engine, autoflush=True ,expire_on_commit=False)
+
+# Base 基类
+class Base(DeclarativeBase):
+    pass
+
+class MetaBase(Base):
+    __tablename__ = "base_autoflush"
+    id = Column(Integer, primary_key=True)
+    pass
+
+Base.metadata.create_all(engine)
+
+