57 lines
1.3 KiB
Python
57 lines
1.3 KiB
Python
from typing import Generator
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from sqlalchemy.engine import Engine
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from sqlalchemy.orm import Session, sessionmaker
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from .models import ORMBaseModel
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class Connection:
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engine: Engine | None = None
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session_local: sessionmaker | None = None
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@classmethod
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def connect(cls, engine: Engine) -> None:
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cls.engine = engine
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cls.session_local = sessionmaker(
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autocommit=False, autoflush=False, bind=engine,
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)
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ORMBaseModel.metadata.create_all(bind=engine)
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@classmethod
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async def get(cls) -> Generator[Session | None, None, None]:
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if cls.session_local is None:
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yield None
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else:
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db = cls.session_local()
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try:
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yield db
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finally:
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db.close()
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ENGINE: Engine | None = None
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SESSION_LOCAL: sessionmaker | None = None
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def reconnect(engine: Engine) -> None:
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global ENGINE, SESSION_LOCAL
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ENGINE = engine
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SESSION_LOCAL = sessionmaker(
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autocommit=False, autoflush=False, bind=engine,
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)
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ORMBaseModel.metadata.create_all(bind=engine)
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async def get() -> Generator[Session | None, None, None]:
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if SESSION_LOCAL is None:
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yield None
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else:
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db = SESSION_LOCAL()
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try:
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yield db
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finally:
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db.close()
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