Question

I have a model category which contains a field called category.parent_id which is used to create a taxonomy (top level categories with sub categories).

At the moment my index page shows the categories as:

Top level category
Sub category
Sub category
Top category

How could I order them in a proper taxonomy (i.e. first all top level categories are taken from db then sub categories, etc) and shown as the following:

Top level category
-- Sub category
-- Sub category
Top category

Answer 1

After hours of banging my head against the wall, I came up with this solution:

ActiveAdmin can not render a partial for the entire index, however you can render one for a single column!

So the work around was to create a column for sub categories like this:

    column "Sub Categories" do |category|
      children = Category.children(category.id)
      if children.present?
        render :partial => "children", :locals => { :children => children }
      end
    end

And then in _children.html.erb view partial you can print out the list like this:

    <% children.each do |child| %>
        <p><%= link_to child.name, edit_admin_category_path(child) %></p>
    <% end %>