Working version

app/database.py

@@ -0,0 +1,36 @@
+from typing import AsyncGenerator
+
+from litestar.contrib.sqlalchemy.plugins import SQLAlchemyAsyncConfig
+from litestar.exceptions import ClientException
+from litestar.status_codes import HTTP_409_CONFLICT
+from sqlalchemy import URL
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker
+
+
+async def provide_transaction(
+    db_session: AsyncSession,
+) -> AsyncGenerator[AsyncSession, None]:
+    try:
+        async with db_session.begin():
+            yield db_session
+    except IntegrityError as exc:
+        raise ClientException(
+            status_code=HTTP_409_CONFLICT,
+            detail=str(exc),
+        ) from exc
+
+
+sessionmaker = async_sessionmaker(expire_on_commit=False)
+
+db_connection_string = URL.create(
+    drivername="postgresql+asyncpg",
+    username="televend",
+    password="televend",
+    host="localhost",
+    port=5433,
+    database="televend",
+)
+db_config = SQLAlchemyAsyncConfig(
+    connection_string=db_connection_string.render_as_string(hide_password=False)
+)