backend/db/database.py

from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker, declarative_base

import os

# Persistent path for Docker/Hugging Face Spaces (Matches Bucket Mount)
DATA_DIR = "/data"
DB_PATH = os.path.join(DATA_DIR, "loan_db.db")

# Fallback to local root if not in Docker environment
if not os.path.exists(DATA_DIR):
    DB_PATH = "./loan_db_v3.db"

SQLALCHEMY_DATABASE_URL = f"sqlite:///{DB_PATH}"

engine = create_engine(
    SQLALCHEMY_DATABASE_URL, connect_args={"check_same_thread": False}
)
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

Base = declarative_base()

# Dependency
def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()