i18n: fix string with variables format

src/database.py

@@ -0,0 +1,50 @@
+import contextlib
+from typing import Annotated, Iterator, Generator
+
+from fastapi import Depends
+from sqlalchemy import (
+    MetaData, create_engine, Connection,
+)
+from sqlalchemy.orm import sessionmaker, Session
+
+from src.config import settings
+from src.constants import DB_NAMING_CONVENTION
+
+engine = create_engine(
+    str(settings.DATABASE_URL),
+    pool_size=settings.DATABASE_POOL_SIZE,
+    pool_recycle=settings.DATABASE_POOL_TTL,
+    pool_pre_ping=settings.DATABASE_POOL_PRE_PING,
+)
+metadata = MetaData(naming_convention=DB_NAMING_CONVENTION)
+sm = sessionmaker(autocommit=False, expire_on_commit=False, bind=engine)
+
+
+@contextlib.contextmanager
+def get_db_connection() -> Iterator[Connection]:
+    with engine.connect() as connection:
+        try:
+            yield connection
+        except Exception:
+            connection.rollback()
+            raise
+
+
+@contextlib.contextmanager
+def get_db_session() -> Iterator[Session]:
+    session = sm()
+    try:
+        yield session
+    except Exception:
+        session.rollback()
+        raise
+    finally:
+        session.close()
+
+
+def get_db() -> Generator[Session, None]:
+    with get_db_session() as session:
+        yield session
+
+
+DbSession = Annotated[Session, Depends(get_db)]