{{? it.is_show_classnumber}} {{~it.books_classnumber :book_classnumber:index}} {{? book_classnumber.active }}
{{??}}
{{?}} {{~}} {{?}} {{? it.is_show_subject}}
{{~it.books_subject :book_subject:index}} {{? book_subject.active }}
{{??}}
{{?}} {{~}} {{?}}
