Add footer

[lunich]

It's necessary to add :render_footer option. If it's set, render <tfoot> with the same content as in the <thead> (at least for first).

[tonymarschall]

That would be nice. Maybe something like:

<%= table_for @users do -%>
  <% column :user %>
  <% column :sum_login, :footer => @total_sum_logins %>
<% end %>

Or for multiline footers:

<%= table_for @users do -%>
  <% column :user %>
  <% column :sum_login do |sum_login| %>
    <% :footer @sum_logins_per_page %>
    <% :footer @sum_logins %>
  <% end %>
<% end %>