lib/kaminari_patch.rb

_paginator.html.haml

= paginator.render do
  %div
    = prev_page_tag
    = (current_page.to_i - 1) * per_page + 1
    \-
    = [current_page.to_i * per_page, total_count].min
    \/
    = total_count
    件
    = next_page_tag

gistfile1.rb

module Kaminari
  module ActionViewExtension
    def paginate(scope, options = {}, &block)
      paginator = Kaminari::Helpers::Paginator.new self, options.reverse_merge(:current_page => scope.current_page, :num_pages => scope.num_pages, :per_page => scope.limit_value, :param_name => Kaminari.config.param_name, :remote => false, :total_count => scope.total_count)
      paginator.to_s
    end
  end
end

# You can do it using Kaminari::PaginatableArray like this:

> arr = Kaminari.paginate_array((1..10).to_a, :total_count => 34).page(1).per(10)
 => [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] 
> arr.total_count
 => 34

# not sure whether this looks better though

In paginate views (app/views/kaminari/_paginate.html.haml), I can't use collection method, such as total_count . So in order to use such method, I use this patch that assigns total_count as :locals in partial view.

Ugh. I haven't noticed that people need total_count in views, but yes, probably that's kaminari's fault.
Feel free to raise an issue or PR if you need to put that feature in kaminari core. Thank you!

Thanks for this!