This visualization shows a minimal Ruby on Rails model called `Person` that manages a person’s first and last name. It demonstrates a `before_save` callback that automatically capitalizes the first name before the record is persisted, and a `name` method that concatenates the two name fields. The code uses ActiveRecord’s `before_save` hook and the `self[:first_name]` attribute accessor to modify the stored value. No rendering or charting library is present; the example is purely a code snippet illustrating database-layer cleanup logic.