app/core/database.py

from sqlalchemy import create_engine
from sqlalchemy.ext.declarative import declarative_base
from sqlalchemy.orm import sessionmaker
from .config import settings

# Create engine
if settings.DATABASE_URL.startswith("sqlite"):
    engine = create_engine(
        settings.DATABASE_URL, 
        connect_args={"check_same_thread": False}
    )
else:
    engine = create_engine(settings.DATABASE_URL)

# Create session
SessionLocal = sessionmaker(autocommit=False, autoflush=False, bind=engine)

# Base class for models
Base = declarative_base()

# Dependency to get database session
def get_db():
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()