File size: 1,673 Bytes
6263792 0888cf8 6263792 0888cf8 6263792 | 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 | from contextlib import asynccontextmanager
from typing import AsyncGenerator
from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
from Backend.core.config import settings
database_url = settings.database_url.replace("postgresql://", "postgresql+asyncpg://")
engine = create_async_engine(
database_url,
echo=False,
pool_size=settings.db_pool_size,
max_overflow=settings.db_max_overflow,
pool_timeout=settings.db_pool_timeout,
pool_recycle=settings.db_pool_recycle,
pool_pre_ping=True,
connect_args={
"statement_cache_size": settings.db_statement_cache_size,
"prepared_statement_cache_size": settings.db_prepared_statement_cache_size,
},
)
async_session_factory = async_sessionmaker(
engine,
class_=AsyncSession,
expire_on_commit=False,
autocommit=False,
autoflush=False,
)
async def get_db() -> AsyncGenerator[AsyncSession, None]:
async with async_session_factory() as session:
try:
yield session
await session.commit()
except Exception:
await session.rollback()
raise
@asynccontextmanager
async def get_db_context() -> AsyncGenerator[AsyncSession, None]:
async with async_session_factory() as session:
try:
yield session
await session.commit()
except Exception:
await session.rollback()
raise
async def init_db() -> None:
from Backend.database.models import Base
async with engine.begin() as conn:
await conn.run_sync(Base.metadata.create_all)
async def close_db() -> None:
await engine.dispose()
|