This is a custom link renderer that will format the pagination bar with Bootstrap4

paginate_helper.rb

module PaginateHelper
  class LinkRenderer < WillPaginate::ActionView::LinkRenderer
    protected

    def html_container(html)
      tag(:nav, tag(:ul, html, class: "pagination"))
    end

    def previous_or_next_page(page, text, classname)
      if page
        tag(:li, link(text, page, class: "page-link"), class: "page-item")
      else
        tag(:li, tag(:a, text, class: "page-link"), class: "page-item disabled")
      end
    end

    def page_number(page)
      unless page == current_page
        tag(:li, link(page, page, class: "page-link"), class: "page-item")
      else
        tag(:li, tag(:a, page, class: "page-link"), class: "page-item active")
      end
    end

    def gap
      tag(:li, tag(:a, '&hellip;', class: "page-link"), class: "page-item disabled")
    end

  end ## end of class

  def bs_will_paginate(collection = nil, options = {})
    options, collection = collection, nil if collection.is_a? Hash
    options = options.merge(
      renderer: PaginateHelper::LinkRenderer,
      previous_label: "&laquo;",
      next_label: "&raquo;"
    )
    will_paginate(collection, options)
  end

end

Example of usage: just bs_will_paginate or bs_will_paginate @users

Thanks! It works perfectly.

Works great! 👍 Thanks!

Great work!