23 lines
645 B
Python
23 lines
645 B
Python
"""数据库引擎与会话管理（SQLAlchemy 2.0）。"""
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from sqlalchemy import create_engine
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from sqlalchemy.orm import DeclarativeBase, sessionmaker
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from .config import settings
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connect_args = {"check_same_thread": False} if settings.DATABASE_URL.startswith("sqlite") else {}
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engine = create_engine(settings.DATABASE_URL, connect_args=connect_args, pool_pre_ping=True)
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SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)
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class Base(DeclarativeBase):
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pass
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def get_db():
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"""FastAPI 依赖：请求级数据库会话。"""
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db = SessionLocal()
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try:
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yield db
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finally:
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db.close()
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