class BookModelWidget(Block):
    def __init__(self, object: Model | None = None, **kwargs) -> None:
        if object is None:
            msg = "object must be provided"
            raise ValueError(msg)
        authors = ", ".join([x.full_name for x in object.authors.all()])
        super().__init__(
            Block(
                f"{object.title} - {authors}", css_class="p-3 mb-1 border text-bg-light"
            ),
            **kwargs,
        )

class PagedBookWidget(PagedModelWidget):
    model = Book
    model_widget = BookModelWidget
    paginate_by = 5