Refactor Photo model constructor to remove timestamp parameter; update helper function to use getattr for safer attribute access.

inventory/routes/helpers.py

@@ -82,6 +82,6 @@ def generate_hashed_filename(file_storage, model_name: str) -> str:
 
 def get_photo_attachable_class_by_name(name: str):
     for cls in PhotoAttachable.__subclasses__():
-        if cls.__tablename__ == name:
+        if getattr(cls, '__tablename__', None) == name:
             return cls
     return None

inventory/routes/photos.py

@@ -14,6 +14,8 @@ def save_photo(file, model: str) -> str:
     rel_path = generate_hashed_filename(file, model)
 
     # Absolute path to save
+    assert current_app.static_folder
+
     abs_path = os.path.join(current_app.static_folder, rel_path)
     os.makedirs(os.path.dirname(abs_path), exist_ok=True)