浅念
49 lines
1.2 KiB
Python
49 lines
1.2 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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async_engine = create_async_engine(
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settings.db_url,
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pool_pre_ping=True,
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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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