21 lines
590 B
Python
Executable File
21 lines
590 B
Python
Executable File
from sqlalchemy import create_engine
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from sqlalchemy.orm import sessionmaker
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from sqlalchemy.ext.declarative import declarative_base
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DATABASE_URL = "postgresql://fastapi:Sj89061189@localhost/fastapi"
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engine = create_engine(DATABASE_URL)
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#不会提交事务 不会自动刷新 不会预加载
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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#ORM 模型都将继承自 Base
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Base = declarative_base()
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def get_db():
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#创建一个数据库会话
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db = SessionLocal()
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#发送异常正确关闭
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try:
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yield db
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finally:
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db.close() |