fix!: removed .commit() from repository level

db/session.py

@@ -1,4 +1,4 @@
-from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
 
 from config import cfg
 
@@ -6,6 +6,29 @@ engine = create_async_engine(cfg.db_url, echo=True)
 async_session = async_sessionmaker(bind=engine, expire_on_commit=False)
 
 
+class UnitOfWork:
+    def __init__(self, session: AsyncSession) -> None:
+        self.session = session
+
+    async def commit(self) -> None:
+        await self.session.commit()
+
+    async def rollback(self) -> None:
+        await self.session.rollback()
+
+    async def __aenter__(self):
+        return self
+
+    async def __aexit__(self, exc_type, *_):
+        if exc_type:
+            await self.rollback()
+
+
 async def get_db():
     async with async_session() as session:
         yield session
+
+
+async def get_uow():
+    async with async_session() as session, UnitOfWork(session) as uow:
+        yield uow