Files
provenance/backend/app/core/db.py
T
justin 03aa9a3ca7 Scaffold FastAPI backend skeleton with health probes
Phase 0 foundation. uv-managed FastAPI app (package=false, runs from source via uv run). Layered seams in place: app/api for routers, app/core for config (pydantic-settings, fully env-driven) and the async SQLAlchemy engine; service/repository/domain layers land with the data model.

Exposes /health (liveness) and /health/ready (Postgres reachability via SELECT 1, 503 on failure) so the deploy wiring is verifiable before any data model exists. Includes a liveness test and the resolved uv.lock. Ignore pytest/ruff/mypy caches.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Justin Paul <justin@jpaul.me>
2026-06-06 10:16:58 -04:00

23 lines
575 B
Python

"""Async database engine.
A single lazily-created async engine for the process. The repository layer
(coming with the data model) will build sessions on top of this; for now it
backs the readiness probe.
"""
from sqlalchemy.ext.asyncio import AsyncEngine, create_async_engine
from app.core.config import get_settings
_engine: AsyncEngine | None = None
def get_engine() -> AsyncEngine:
global _engine
if _engine is None:
_engine = create_async_engine(
get_settings().database_url,
pool_pre_ping=True,
)
return _engine