ruby on rails, ActiveResource::Base, paginate, WillPaginate, RESTful xml resource and paginate

This sample assume that you have a service in the server that respond .xml

class NoteIntranet < ActiveResource::Base
  self.site = INTRANET_CREDENTIALS[:site]
  self.element_name = 'note'
  cattr_reader :per_page
  @@per_page = 20
  def self.paginate(*args) 
    options = args.pop 
    @@per_page = options.delete(:per_page) || @@per_page
    WillPaginate::Collection.create((options.delete(:page) || 1), @@per_page) do |pager|
      all_elements = self.find(:all, options)
      result = all_elements[pager.offset, pager.per_page].to_a
      # inject the result array into the paginated collection:
      pager.replace(result)
      unless pager.total_entries
        # the pager didn't manage to guess the total count, do it manually
        pager.total_entries = all_elements.size
      end
    end
  end

end

In the controller you may have conditions that are defined in the service, an example is a filter:

      @notes = NoteIntranet.paginate(:page => params[:page], :params => { :title => params[:title] })

In the server service, in the controller you have:

      @notes = Note.paginate(:page => params[:page], :conditions => ["title like '%?%'",params[:title]] )

This idea came from Gasper - Luis Guardiola