trade/app/db.py

from collections.abc import Generator
from sqlalchemy import create_engine
from sqlalchemy.orm import DeclarativeBase, Session, sessionmaker

from app.core import get_settings

settings = get_settings()
engine = create_engine(settings.database_url, pool_pre_ping=True)
SessionLocal = sessionmaker(bind=engine, autoflush=False, autocommit=False)


class Base(DeclarativeBase):
    pass


def get_db() -> Generator[Session, None, None]:
    db = SessionLocal()
    try:
        yield db
    finally:
        db.close()


def init_db() -> None:
    from app import models  # noqa: F401

    Base.metadata.create_all(bind=engine)