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50 lines
1.2 KiB
Python
50 lines
1.2 KiB
Python
"""Database session management and engine configuration.
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统一使用 app.config 中的数据库配置，移除重复的 DatabaseSettings。
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"""
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from contextlib import contextmanager
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from typing import Generator
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from app.config import settings
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from sqlalchemy import create_engine
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from sqlalchemy.orm import Session, sessionmaker
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engine = create_engine(
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settings.database_url,
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pool_size=settings.DATABASE_POOL_SIZE,
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max_overflow=settings.DATABASE_MAX_OVERFLOW,
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pool_timeout=settings.DATABASE_POOL_TIMEOUT,
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pool_recycle=settings.DATABASE_POOL_RECYCLE,
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)
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SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
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def get_db() -> Generator[Session, None, None]:
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"""Dependency for getting database sessions."""
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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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@contextmanager
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def get_db_context() -> Generator[Session, None, None]:
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"""Context manager for database sessions.
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Usage:
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with get_db_context() as db:
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db.query(Model).all()
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"""
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db = SessionLocal()
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try:
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yield db
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db.commit()
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except Exception:
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db.rollback()
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raise
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finally:
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db.close()
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