Render templates only if they exist (with fallback option)

application_helper.rb

module ApplicationHelper
  # https://coderwall.com/p/ftbmsa (Render template if exists in Rails)
  def try_to_render(partial_path, options = {})
    fallback = options.delete(:fallback_to)
    prefixes = partial_path.split("/")[0..-2].presence || controller._prefixes
    partial_name = partial_path.split("/").last

    if lookup_context.exists?(partial_name, prefixes, true) # "true" is crucial !
      render partial_path, options
    else
      render fallback, options
    end
  end
end