42 lines
893 B
Python
42 lines
893 B
Python
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"""数据库连接与会话管理。"""
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from __future__ import annotations
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from typing import Generator
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from sqlalchemy import create_engine
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from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker
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from app.config import get_settings
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class Base(DeclarativeBase):
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pass
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_settings = get_settings()
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import os as _os
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_pool_size = int(_os.environ.get("DB_POOL_SIZE", "20"))
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_max_overflow = int(_os.environ.get("DB_MAX_OVERFLOW", "30"))
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_engine_kwargs: dict = dict(
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echo=_settings.db_echo,
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future=True,
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pool_pre_ping=True,
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pool_size=_pool_size,
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max_overflow=_max_overflow,
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)
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engine = create_engine(_settings.db_url, **_engine_kwargs)
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SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False, future=True)
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def get_db() -> Generator[Session, None, None]:
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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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