After optimizations

load_overview_tree.rb

  collection_action :load_overviewtree_as_json do
    if params[:root_id].present?
      objects = Goldencobra::Article.where(id: params[:root_id]).first.children.reorder(:url_name)
      cache_key ||= ["articles", params[:root_id], objects.map(&:id), objects.maximum(:updated_at)]

      articles = Rails.cache.fetch(cache_key) do
        Goldencobra::Article.find(params[:root_id])
          .children.reorder(:url_name).as_json(only: [:id, :url_path, :title, :url_name],
                                             methods: [:has_children, :restricted])
      end
    else
      objects = Goldencobra::Article.reorder(:url_name).roots
      cache_key ||= ["articles", objects.map(&:id), objects.maximum(:updated_at)]

      articles = Rails.cache.fetch(cache_key) do
        Goldencobra::Article.order(:url_name).roots.as_json(only: [:id, :url_path, :title, :url_name],
                                                            methods: [:has_children, :restricted])
      end
    end
    render json: Oj.dump({"articles" => articles})
  end