Baseline md2vk: docs, audit log, docker 8420, openspec, deploy

app/database.py

@@ -0,0 +1,37 @@
+"""База данных: async engine, сессии, инициализация."""
+
+from __future__ import annotations
+
+from pathlib import Path
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+
+from app.config import settings
+
+# Создаём каталог для БД, если SQLite
+_db_path = settings.database_url.replace("sqlite+aiosqlite:///", "")
+if _db_path != settings.database_url:
+    Path(_db_path).parent.mkdir(parents=True, exist_ok=True)
+
+engine = create_async_engine(settings.database_url, echo=False)
+async_session_factory = async_sessionmaker(engine, class_=AsyncSession, expire_on_commit=False)
+
+
+async def get_db() -> AsyncSession:
+    """FastAPI-зависимость: сессия БД."""
+    async with async_session_factory() as session:
+        try:
+            yield session
+            await session.commit()
+        except Exception:
+            await session.rollback()
+            raise
+        finally:
+            await session.close()
+
+
+async def init_db():
+    """Создаёт таблицы при старте."""
+    from app.models import Base  # noqa: F401 — импорт моделей для регистрации
+    async with engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)