<% if book.cover.attached? %> <%= image_tag book.cover, alt: "Book cover", class: "book__cover" %> <% else %> <%= image_tag "empty-cover.png", alt: "Book cover", class: "book__cover margin-block-none center" %> <%= book.title %> <% end %> <%= turbo_frame_tag dom_id(book, :bookmark), src: book_bookmark_path(book), target: "_top" %>