如何在list.gsp中显示链接表的值而不是id？Grails

class Book {
    String title
    Author author

    static belongsTo = [author: Author]
}

<table>
    <thead>
        <tr>
            <th>Title</th>
            <th>Author</th>
        </tr>
    </thead>
    <tbody>
        <g:each in="${bookList}" var="book">
            <tr>
                <td>${book.title}</td>
                <td>
                    <g:link controller="author" action="show" id="${book.author.id}">
                        <g:fieldValue bean="${book}" field="author.name" />
                    </g:link>
                </td>
            </tr>
        </g:each>
    </tbody>
</table>