ruby-on-rails - rjs - page.alert 内的 ruby​​ 循环

Question

我的 rjs 文件中有以下代码：

if @books_by_author.count != 0
page.alert("The following books reference the author you want to delete: \n

     # here i want to list all the books referencing the author
");

end

如何遍历@books_by_author 并在 page.alert 中显示他们的名字？

感谢您的宝贵帮助

Answer 1

使用Array.join：

page.alert("The following books reference the author you want to delete: \n
            #{@books_by_author.join(', /n')} ");

Ultimation 的建议：如果数组包含模型，而不是字符串，则需要将它们映射到标题：

page.alert("The following books reference the author you want to delete: \n
            #{@books_by_author.map(&:title).join(', /n')} ");