Spaces:
Sleeping
Sleeping
File size: 1,907 Bytes
d5684b3 f92858b d5684b3 f92858b d5684b3 f92858b d5684b3 f92858b d5684b3 f92858b d5684b3 f92858b d5684b3 f92858b | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 | import logging
import contextlib
from typing import Any, AsyncIterator
from sqlalchemy.ext.asyncio import (
AsyncConnection,
AsyncSession,
async_sessionmaker,
create_async_engine,
)
from sqlalchemy.orm import declarative_base
from config.index import config as env
logger = logging.getLogger(__name__)
Base = declarative_base()
class PostgresDatabase:
def __init__(self, host: str, engine_kwargs: dict[str, Any] = {}):
self._engine = create_async_engine(host, **engine_kwargs)
self._sessionmaker = async_sessionmaker(autocommit=False, bind=self._engine)
async def close(self):
if self._engine is None:
raise Exception("DatabaseSessionManager is not initialized")
await self._engine.dispose()
self._engine = None
self._sessionmaker = None
@contextlib.asynccontextmanager
async def connect(self) -> AsyncIterator[AsyncConnection]:
if self._engine is None:
raise Exception("DatabaseSessionManager is not initialized")
async with self._engine.begin() as connection:
try:
yield connection
except Exception:
await connection.rollback()
raise
@contextlib.asynccontextmanager
async def session(self) -> AsyncIterator[AsyncSession]:
if self._sessionmaker is None:
raise Exception("DatabaseSessionManager is not initialized")
session = self._sessionmaker()
try:
yield session
except Exception:
await session.rollback()
raise
finally:
await session.close()
def get_engine(self):
return self._engine
postgresdb = PostgresDatabase(env.SQLALCHEMY_DATABASE_URL, {"echo": True, "future": True})
async def get_db_session():
async with postgresdb.session() as session:
yield session
|