Refactor models to implement ValidatableMixin; add validation logic for state management in Area, Brand, Item, Room, and RoomFunction classes

utils/load.py

@@ -0,0 +1,46 @@
+from sqlalchemy.orm import joinedload, selectinload
+from ..models import User, Room, Inventory, WorkLog
+from .. import db
+
+def eager_load_user_relationships(query):
+    return query.options(
+        joinedload(User.supervisor),
+        joinedload(User.location).joinedload(Room.room_function)
+    )
+
+def eager_load_inventory_relationships(query):
+    return query.options(
+        joinedload(Inventory.owner),
+        joinedload(Inventory.brand),
+        joinedload(Inventory.item),
+        selectinload(Inventory.location).selectinload(Room.room_function)
+    )
+
+def eager_load_room_relationships(query):
+    return query.options(
+        joinedload(Room.area),
+        joinedload(Room.room_function),
+        selectinload(Room.inventory),
+        selectinload(Room.users)
+    )
+
+def eager_load_worklog_relationships(query):
+    return query.options(
+        joinedload(WorkLog.contact),
+        joinedload(WorkLog.work_item)
+    )
+
+def chunk_list(lst, chunk_size):
+    return [lst[i:i + chunk_size] for i in range(0, len(lst), chunk_size)]
+
+def add_named_entities(items: list[str], model, attr: str, mapper: dict | None = None):
+    for name in items:
+        clean = name.strip()
+        if clean:
+            print(f"Creating new {attr}: {clean}")
+            new_obj = model(**{attr: clean})
+            db.session.add(new_obj)
+            if mapper is not None:
+                db.session.flush()
+                mapper[clean] = new_obj.id
+                print(f"New {attr} '{clean}' added with ID {new_obj.id}")