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File size: 1,845 Bytes
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database.py — SQLAlchemy engine, session factory, and Base.
The database path defaults to a local `data/` directory but can be overridden
via the DATABASE_PATH environment variable (e.g., /data/staffinc_mvp.db for
Railway volume mounts).
"""
import os
from pathlib import Path
from sqlalchemy import create_engine
from sqlalchemy.orm import DeclarativeBase, sessionmaker
# ---------------------------------------------------------------------------
# Database path configuration
# ---------------------------------------------------------------------------
_default_db_dir = Path(__file__).resolve().parent.parent / "data"
_default_db_dir.mkdir(parents=True, exist_ok=True)
_default_db_path = _default_db_dir / "staffinc_mvp.db"
DATABASE_PATH = os.getenv("DATABASE_PATH", str(_default_db_path))
# Ensure the parent directory of the database file exists (e.g. for custom volume mounts)
Path(DATABASE_PATH).parent.mkdir(parents=True, exist_ok=True)
DATABASE_URL = f"sqlite:///{DATABASE_PATH}"
# ---------------------------------------------------------------------------
# Engine & session
# ---------------------------------------------------------------------------
engine = create_engine(
DATABASE_URL,
connect_args={"check_same_thread": False}, # required for SQLite
echo=False,
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)
class Base(DeclarativeBase):
"""Declarative base for all ORM models."""
pass
# ---------------------------------------------------------------------------
# Dependency for FastAPI route injection
# ---------------------------------------------------------------------------
def get_db():
"""Yield a database session and ensure it is closed after the request."""
db = SessionLocal()
try:
yield db
finally:
db.close()
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