Question

我使用简单的导航和内置的嵌套类别构建了导航菜单，我在此菜单中显示。

navigation.rb代码：

  navigation.items do |primary|
    Category.roots.map do |root|
      primary.item ":root_#{root.id}", root.title, category_path(root) do |secondary|
        root.descendants.map do |desc|
          secondary.item ":desc_#{desc.id}", desc.title, category_path(desc)
        end
      end
    end
  end

问题是：如何在菜单中显示所有级别的类别。该代码仅使用两级嵌套。

提前感谢

Answer 1

请看一下refinery-cms如何做到这一点。

_menu.html.erb接近你所拥有的。除此之外，它还有另一个名为_menu_branch.html.erb的部分，它以递归方式呈现菜单的子菜单。

https://github.com/resolve/refinerycms/blob/master/core/app/views/refinery/_menu.html.erb https://github.com/resolve/refinerycms/blob/master/core/app/views/refinery/_menu_branch.html.erb

来自github的代码：

_menu.html.erb

<nav id='<%= dom_id %>' class='<%= css %>'>
  <ul>
    <%= render :partial => '/refinery/menu_branch', :collection => roots,
               :locals => {
                 :hide_children => hide_children,
                 :sibling_count => (roots.length - 1),
                 :apply_css => true #if you don't care about class='first' class='last' or class='selected' set apply_css to false for speed.
               } -%>
  </ul>
</nav>

_menu_branch.html.erb

<li<%= ['', css].compact.join(' ').gsub(/\ *$/, '').html_safe %>>
<%= link_to(menu_branch.title, main_app.url_for(menu_branch.url)) -%>
  <% if (children = menu_branch.children unless hide_children).present? -%>
    <ul class='clearfix'>
      <%= render :partial => '/refinery/menu_branch', :collection => children,
                 :locals => {
                   :apply_css => local_assigns[:apply_css],
                   :hide_children => !!hide_children
                 } -%>
    </ul>
  <% end -%>
</li>

Answer 2

如果这有帮助，你将不得不使用递归，你可以在这里看到一个例子：Recursive Rails Nested Resources

Rails简单导航，嵌套集

2 个答案: