浅念
f92aac1a3d
- 新 group-messages 实体:真机探明群消息=同一 msg/chats 端点 friendId 传 roomId; talker=发送者wxid、msgId=null→owner:room:createTime:talker 合成稳定主键(重扫幂等) - 浏览器守护循环:超大群撑崩渲染进程时重启浏览器跳过毒群继续(实战2次自愈); 200页上限;恢复路径补 await - base.py SQLite connect_args timeout=60:并发写忙等而非撞锁报错 (双抓取器并发写实测 database is locked 崩任务) - 5个新单测,全量410绿 Co-Authored-By: Claude <noreply@anthropic.com>
55 lines
1.6 KiB
Python
55 lines
1.6 KiB
Python
"""Database core: declarative base, async engine, session factory.
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Production targets MySQL via `asyncmy` (configured by `Settings.db_url`).
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Unit tests build their own in-memory SQLite engines (see `tests/test_db_base.py`)
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and only import `Base` / `async_session_maker` from here.
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"""
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from collections.abc import AsyncIterator
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from sqlalchemy.ext.asyncio import (
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AsyncSession,
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async_sessionmaker,
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create_async_engine,
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)
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from sqlalchemy.orm import DeclarativeBase
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from app.config import get_settings
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class Base(DeclarativeBase):
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"""Common declarative base for all ORM models in the project."""
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settings = get_settings()
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# SQLite: 写锁竞争时忙等 60s 而不是立刻报 "database is locked"
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# （多进程并发写的场景：页面抓取器 × 2 + 后端 API 同时跑，2026-08-19 实测撞锁崩任务）。
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_connect_args = {"timeout": 60} if settings.db_url.startswith("sqlite") else {}
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async_engine = create_async_engine(
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settings.db_url,
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pool_pre_ping=True,
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pool_recycle=3600, # recycle connections before MySQL wait_timeout (default 8h) closes them
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connect_args=_connect_args,
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future=True,
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)
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async_session_maker: async_sessionmaker[AsyncSession] = async_sessionmaker(
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async_engine,
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expire_on_commit=False,
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)
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async def get_session() -> AsyncIterator[AsyncSession]:
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"""FastAPI dependency that yields an `AsyncSession`.
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Usage::
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@app.get("/")
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async def index(session: AsyncSession = Depends(get_session)):
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...
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"""
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async with async_session_maker() as session:
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yield session
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