Do I need an Enumerator for this?

Question

I want to do this:

<div class="menu">

  <%- render_menu do |title,path,children| %>

    <%= link_to title, path %>

    <div class="submenu">
      <%= render_menu(children) do |title,path,children| %>
        <%= link_to title, path %>
        <%= children %>
      <%- end %>
    </div>

  <% end %>

</div>

The method render_menu would look something like this:

def render_menu(children=nil)
  children = Paths.roots if children.nil?
  children.collect do |child|
    [ child.title, child.path, child.children ]
  end
end

I'm not sure what the render_menu needs to return to get the three params.. The render_menu will grab the default menu items if no argument is given..

As an aside: the code `<%= children %>` will render the result of `children.to_s` that probably is not what you want. — toro2k, Apr 05 '13 at 14:55

toro2k · Accepted Answer · 2013-04-05T14:50:52.643

You have to use yield and replace each for collect inside render_menu:

def render_menu(children=nil)
  children = Paths.roots if children.nil?
  children.each do |child|
    yield([child.title, child.path, child.children])
  end
end

You should also modify your template to not display the value returned by render_menu:

<div class="submenu">
    <% render_menu(children) do |title,path,children| %>
        <%= link_to title, path %>
        <%= children %>
    <% end %>
</div>

Do I need an Enumerator for this?

1 Answers1