51 lines
1.2 KiB
Python
51 lines
1.2 KiB
Python
from typing import Generator
|
|
|
|
from sqlalchemy.engine import Engine
|
|
from sqlalchemy.orm import Session, sessionmaker
|
|
|
|
from .models import ORMBaseModel
|
|
|
|
|
|
class SessionManager:
|
|
__session: Session
|
|
|
|
def __init__(self, session: Session) -> None:
|
|
self.__session = session
|
|
|
|
def __enter__(self) -> Session:
|
|
return self.__session
|
|
|
|
def __exit__(self, *args) -> None:
|
|
self.__session.close()
|
|
|
|
|
|
class Connection:
|
|
engine: Engine | None = None
|
|
session_local: sessionmaker | None = None
|
|
|
|
@classmethod
|
|
def connect(cls, engine: Engine) -> None:
|
|
cls.engine = engine
|
|
cls.session_local = sessionmaker(
|
|
autocommit=False, autoflush=False, bind=engine,
|
|
)
|
|
ORMBaseModel.metadata.create_all(bind=engine)
|
|
|
|
@classmethod
|
|
def use(cls) -> SessionManager | None:
|
|
if cls.session_local is None:
|
|
return None
|
|
|
|
return SessionManager(cls.session_local())
|
|
|
|
@classmethod
|
|
async def get(cls) -> Generator[Session | None, None, None]:
|
|
if cls.session_local is None:
|
|
yield None
|
|
|
|
else:
|
|
db = cls.session_local()
|
|
try:
|
|
yield db
|
|
finally:
|
|
db.close()
|