omzetten vanuit DAO: basic get operaties die geen domeinmodellen teru…

…ggeven #45

backend/domain/logic/basic_operations.py

@@ -0,0 +1,23 @@
+from typing import TypeVar, Type
+
+from sqlalchemy import select
+from sqlalchemy.orm import Session
+
+from db.errors.database_errors import ItemNotFoundError
+from db.models.models import AbstractModel
+
+T = TypeVar("T", bound=AbstractModel)
+
+
+def get(session: Session, object_type: Type, ident: int) -> T:
+    generic_object: T | None = session.get(object_type, ident)
+
+    if not generic_object:
+        msg = f"object with id {ident} not found"
+        raise ItemNotFoundError(msg)
+
+    return generic_object.to_domain_model()
+
+
+def get_all(session: Session) -> list[T]:
+    return list(session.scalars(select(T)).all())