Joey
48 lines
1.3 KiB
Python
48 lines
1.3 KiB
Python
"""数据库：SQLite（aiosqlite）+ SQLAlchemy async。"""
|
||
from __future__ import annotations
|
||
|
||
from collections.abc import AsyncGenerator
|
||
|
||
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
|
||
from sqlalchemy.orm import DeclarativeBase
|
||
|
||
from config import get_settings
|
||
|
||
|
||
class Base(DeclarativeBase):
|
||
pass
|
||
|
||
|
||
_engine = None
|
||
_session_factory: async_sessionmaker[AsyncSession] | None = None
|
||
|
||
|
||
def get_engine():
|
||
global _engine, _session_factory
|
||
if _engine is None:
|
||
settings = get_settings()
|
||
db_path = f"{settings.data_dir}/app.db"
|
||
_engine = create_async_engine(f"sqlite+aiosqlite:///{db_path}", echo=False)
|
||
_session_factory = async_sessionmaker(_engine, expire_on_commit=False)
|
||
return _engine
|
||
|
||
|
||
def get_session_factory() -> async_sessionmaker[AsyncSession]:
|
||
get_engine()
|
||
assert _session_factory is not None
|
||
return _session_factory
|
||
|
||
|
||
async def get_db() -> AsyncGenerator[AsyncSession, None]:
|
||
async with get_session_factory()() as session:
|
||
yield session
|
||
|
||
|
||
async def init_db() -> None:
|
||
"""启动时建表（MVP 不引 Alembic，模型变更删库重建即可）。"""
|
||
import models # noqa: F401 确保模型注册
|
||
|
||
engine = get_engine()
|
||
async with engine.begin() as conn:
|
||
await conn.run_sync(Base.metadata.create_all)
|