[Ruby on Rails 5] Ransack + Kaminari + Bootstrap4 でページネーションを機能させる

Rails 5.1.4
ransack 1.8.6
kaminari 1.1.1

gem 'kaminari'

% rails g kaminari:config

# frozen_string_literal: true
Kaminari.configure do |config|
  config.default_per_page = 5
  # config.max_per_page = nil
  # config.window = 4
  # config.outer_window = 0
  # config.left = 0
  # config.right = 0
  # config.page_method_name = :page
  # config.param_name = :page
  # config.params_on_first_page = false
end

en:
  views:
    pagination:
      first: "« First"
      last: "Last »"
      previous: "‹ Prev"
      next: "Next ›"
      truncate: "…"
  helpers:
    page_entries_info:
      one_page:
        display_entries:
          zero: "No %{entry_name} found"
          one: "Displaying <b>1</b> %{entry_name}"
          other: "Displaying <b>all %{count}</b> %{entry_name}"
      more_pages:
        display_entries: "Displaying %{entry_name} <b>%{first}&nbsp;-&nbsp;%{last}</b> of <b>%{total}</b> in total"

class DataController < ApplicationController
  # GET /data
  # GET /data.tsv
  def index
    @q    = Datum.ransack(params[:q])
    @data = @q.result(distinct: true)
    respond_to do |format|
      format.html { @data = @data.page(params[:page]) }
      format.tsv { send_data @data.to_csv(col_sep: "\t"), filename: "data-#{Time.zone.now.strftime('%d%m%Y%H%M')}.tsv" }
    end
  end

%h2= page_entries_info @data
= paginate @data

% rails g kaminari:views bootstrap4 -e haml