Налаштування will_paginate для Bootstrap у Sinatra - http://ruby-ua.blogspot.com/2012/02/willpaginate-bootstrap-sinatra.html

bootstrap_link_render.rb

class BootstrapLinkRenderer < ::WillPaginate::Sinatra::LinkRenderer
  protected
  
  def html_container(html)
    tag :div, tag(:ul, html), container_attributes
  end

  def page_number(page)
    tag :li, link(page, page, :rel => rel_value(page)), :class => ('active' if page == current_page)
  end

  def gap
    tag :li, link(super, '#'), :class => 'disabled'
  end

  def previous_or_next_page(page, text, classname)
    tag :li, link(text, page || '#'), :class => [classname[0..3], classname, ('disabled' unless age)].join(' ')
  end
end

helper.rb

helpers do

  def page_navigation_links(pages)
    will_paginate(pages, :class => 'pagination', :inner_window => 2, :outer_window => 0, :renderer => BootstrapLinkRenderer, :previous_label => '←', :next_label => '→')
  end

end

index.haml

= page_navigation_links @events

require.rb

require 'will_paginate'
require 'will_paginate/data_mapper'