Fix type annotation for location_id; change from Optional[str] to Optional[int] for correct database mapping

models/users.py

@@ -17,7 +17,7 @@ class User(db.Model):
     active: Mapped[Optional[bool]] = mapped_column("Active", Boolean, server_default=text('((0))'))
     last_name: Mapped[Optional[str]] = mapped_column("Last", Unicode(255), nullable=True)
     first_name: Mapped[Optional[str]] = mapped_column("First", Unicode(255), nullable=True)
-    location_id: Mapped[Optional[str]] = mapped_column(ForeignKey("Rooms.ID"), nullable=True)
+    location_id: Mapped[Optional[int]] = mapped_column(ForeignKey("Rooms.ID"), nullable=True)
     supervisor_id: Mapped[Optional[int]] = mapped_column("Supervisor", Integer, ForeignKey("Users.ID"))
 
     supervisor: Mapped[Optional['User']] = relationship('User', remote_side='User.id', back_populates='subordinates')

routes.py

@@ -407,22 +407,23 @@ def settings():
                 if mapper is not None:
                     db.session.flush()
                     mapper[clean] = new_obj.id
-    
+
     def resolve_id(raw_id, fallback_list, id_map, label):
         try:
             resolved_id = int(raw_id)
         except (TypeError, ValueError):
             raise ValueError(f"{label.title()} ID was not a valid integer: {raw_id}")
-    
+
         if resolved_id >= 0:
             # Try to validate this ID by checking if it appears in the map values
             if resolved_id in id_map.values():
                 return resolved_id
             else:
                 raise ValueError(f"{label.title()} ID {resolved_id} not found in known {label}s.")
-        
+
         # It's a negative ID = created on frontend. Resolve from fallback list
         index = abs(resolved_id + 1)
+        entry = None  # Ensure entry is always defined
         try:
             entry = fallback_list[index]
             key = entry["name"] if isinstance(entry, dict) else str(entry).strip()