tap/app/views/users/show.html.erb

<%= render partial: 'flash' %>
<div class="row">
  <%= render 'sidebar' %>
   <div id="user_info" class="col-sm-9">
    <% if @orders.any? %>
      <h4>Previously ordered</h4>
      Total:
      <ul>
        <li>
        <%= @categories.map{|c| pluralize(c.count, c.category)}.to_sentence %>
        </li>
      </ul>

      Specifics:
      <%= content_tag :ul do %>
        <% @products.each do |p| %>
        <%= content_tag :li, pluralize(p.count, p.name) %>
      <% end %>
    <% end %>

      <h4>All orders (<%= @user.orders_count %>)</h4>
      <table class="orders"><%= render @orders %></table>
      <%= will_paginate @orders %>
    </div>
  <% end %>
</div>
</div>