Django Model Fields With Attributes

A custom Django model field called MarkdownField is created to store a string as the underlying data but exposes additional attributes on model instances. The implementation involves a field class, a Python descriptor, and a final value object. The descriptor overrides attribute access and sets the underlying data, while the value object wraps the actual value and provides extra functionality such as converting Markdown to HTML. This approach allows for sub-attributes on fields and provides clarity when assignments need to be handled.