Files
Project-SDE-WP-Suite/server/db.py
n.siegfried a33b777aca Add Python/FastAPI + PostgreSQL backend (Phase 1)
- server/: FastAPI app with SQLAlchemy models for sops, work_packages, comments
- Endpoints for SOP/WP upsert+list+get+delete and comment create+list;
  /api/feedback kept as an alias so the existing client keeps working
- Portable across engines (PostgreSQL prod, SQLite dev fallback)
- requirements.txt, .env.example, and server/README.md (Postgres + systemd)
- NGINX now proxies /api/ to the API (replaces the Power Automate hop;
  comments persist to SQL)
- Rewrite DEPLOYMENT.md for the API + database architecture
- Add .gitignore for venv/.env/sqlite

Phase 2 (wire the client apps to the API) is next.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-15 10:58:52 -07:00

42 lines
1.3 KiB
Python

"""Database engine and session setup.
The connection string comes from the DATABASE_URL environment variable, e.g.
postgresql+psycopg://wpsuite:secret@db-host:5432/wpsuite
If unset, it falls back to a local SQLite file so the API can be run and tested
on any machine without Postgres. The schema is identical either way (SQLAlchemy
handles the dialect differences).
"""
import os
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, DeclarativeBase
# Load a local .env if present (dev convenience). In production the DATABASE_URL
# normally comes from the systemd unit's Environment / EnvironmentFile instead.
try:
from dotenv import load_dotenv
load_dotenv()
except Exception:
pass
DATABASE_URL = os.getenv("DATABASE_URL", "sqlite:///./wpsuite.db")
# SQLite needs this flag to be used from FastAPI's threadpool; Postgres ignores it.
connect_args = {"check_same_thread": False} if DATABASE_URL.startswith("sqlite") else {}
engine = create_engine(DATABASE_URL, connect_args=connect_args, pool_pre_ping=True, future=True)
SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False, future=True)
class Base(DeclarativeBase):
pass
def get_db():
"""FastAPI dependency that yields a session and always closes it."""
db = SessionLocal()
try:
yield db
finally:
db.close()