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42 lines
1.1 KiB
Python
42 lines
1.1 KiB
Python
"""Database module."""
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from contextlib import contextmanager, AbstractContextManager
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from typing import Callable
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import logging
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from sqlalchemy import create_engine, orm
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from sqlalchemy.ext.declarative import declarative_base
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from sqlalchemy.orm import Session
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logger = logging.getLogger(__name__)
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Base = declarative_base()
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class Database:
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def __init__(self, db_url: str) -> None:
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self._engine = create_engine(db_url, echo=True)
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self._session_factory = orm.scoped_session(
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orm.sessionmaker(
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autocommit=False,
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autoflush=False,
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bind=self._engine,
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),
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)
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def create_database(self) -> None:
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Base.metadata.create_all(self._engine)
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@contextmanager
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def session(self) -> Callable[..., AbstractContextManager[Session]]:
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session: Session = self._session_factory()
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try:
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yield session
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except Exception:
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logger.exception("Session rollback because of exception")
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session.rollback()
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raise
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finally:
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session.close()
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