Question

我有一个导航面板。如果我点击它，我希望菜单项的类更改为active。

%li= { :class => current_page?(admin_roles_path) ? 'active' : nil }
    = link_to "Roles", admin_roles_path

但是我收到以下错误：

Haml::SyntaxError in Admin::Roles#index
Showing /sites/freshapp/app/views/layouts/_sidebar.html.haml where line #7 raised:

Illegal nesting: content can't be both given on the same line as %li and nested within it.

Answer 1

=之后您不需要%li，并且您有太多空格/标签。（Haml是一种嵌套语言，标签/空格的数量很重要）。这样做：

%li{ :class => current_page?(admin_roles_path) ? 'active' : nil }
  = link_to "Roles", admin_roles_path

Answer 2

试试这个（=之后

} %li不需要

%li{ :class => current_page?(admin_roles_path) ? 'active' : nil }
  = link_to "Roles", admin_roles_path

{{1}}

Answer 3

试试这个

%li{ :class => "#{current_page?(admin_roles_path) ? 'active' : nil}"}
  = link_to "Roles", admin_roles_path

我不能改变标签类

3 个答案: