Polymorphic Render

application_helper.rb

module ApplicationHelper
  def polymorphic_render(resource, suffix = nil, options = {})
    if resource.nil?
      return
    elsif resource.is_a? Array
      capture do
        resource.each { |res| concat polymorphic_render(res, suffix, options) }
      end
    elsif resource.respond_to? :to_partial_path
      path = [resource.to_partial_path, *Array(suffix)].compact_blank.join('_')
      name = File.basename(resource.to_partial_path)
      render options.merge(partial: path, object: resource, as: name)
    else
      # maybe Rails can figure it out
      render resource, options
    end
  end
end