bootstrap builder for breadcrumbs_on_rails gem

bootstrap_breadcrumbs_builder.rb

# bootstrap builder for breadcrumbs_on_rails gem
class BootstrapBreadcrumbsBuilder < BreadcrumbsOnRails::Breadcrumbs::Builder
  def render
    @context.content_tag(:ul, class: 'breadcrumb') do
      @elements.collect do |element|
        render_element(element)
      end.join.html_safe
    end
  end

  def render_element(element)
    active = element.path.nil? || @context.current_page?(compute_path(element))
    # Bootstrap use '/' divider by default but you can customize it:
    # divider = @context.content_tag(:span, '/'.html_safe, class: 'divider') unless active

    @context.content_tag(:li, :class => ('active' if active)) do
      content = if element.path.nil?
        compute_name(element)
      else
        @context.link_to_unless_current(compute_name(element), compute_path(element), element.options)
      end

      # content + (divider || '')
      content
    end
  end
end


# Usage:
# = render_breadcrumbs(builder: BootstrapBreadcrumbsBuilder)

Thanks @extazystas, this was very helpful! One tweak that I found useful was to add a check that there are indeed elements to render (this avoids having an empty looking <ul>)

 def render
    return "" if @elements.count == 0
    @context.content_tag(:ul, class: 'breadcrumb') do 
        @elements.collect do |element|
            render_element(element)
        end.join.html_safe
    end
end

Putting this code in an initializer works like a charm.