Padrino pagination

gistfile1.rb

#
# Adapted from http://pastebin.com/FL5KeQQH
#
# As mentioned on the link above put this on app/helpers/pagination.rb
# and you can use in your view
#
# =will_paginate @posts
#
# I'm also using this https://gist.github.com/837683
#
# This code allows for the helper to recognize
# custom page params and multiple pagination on the same page.
# That way you can also:
#
# =will_paginate @posts, :param_name => "post_page"
#
# Also it should deal correctly with multiple GET params being them
# page params or otherwise.
#
# I bet there's a more elegant way to approach this, but regex is not
# my forte.
#
# Hope this is useful. Please do contribute ;)

require 'will_paginate/view_helpers/base'
require 'will_paginate/view_helpers/link_renderer'
 
WillPaginate::ViewHelpers::LinkRenderer.class_eval do
  protected
  def url(page)
    url = @template.request.url
    if page == 1
      if url =~ /[?+]#{param_name}=[0-9][&+]/ # ?PAGE=7&somevar=abcd
        url = url.gsub(/[?+]#{param_name}=[0-9][&+]+/, '?')
      elsif url =~ /[&+]#{param_name}=[0-9][&+]/ # ?somevar=1234&PAGE=7&somevar=abcd
        url = url.gsub(/[&+]#{param_name}=[0-9][&+]+/, '&')
      elsif url =~ /[&+]#{param_name}=[0-9]/ # ?somevar=1234&somevar=abcd&PAGE=7
        url = url.gsub(/[&+]#{param_name}=[0-9]+/, '')
      elsif
        url = url.gsub(/[?+]#{param_name}=[0-9]+/, '') # ?PAGE=7 and no more params
      end
      url
    else
      if url =~ /#{param_name}=[0-9]+/
        url.gsub(/#{param_name}=[0-9]+/, "#{param_name}=#{page}")
      else
        if @template.request.params.empty?
          url + "?#{param_name}=#{page}"
        else
          url + "&#{param_name}=#{page}"
        end
      end
    end
  end
end
 
include WillPaginate::ViewHelpers::Base

note - Padrino Will Paginate with custom selectors