如何在助手中使用unobustrive JS重构link_to_function？

问：

我正在使用我的方法之一：link_to_functionApplicationHelper

def link_to_add_fields(name, f, association)
  new_object = f.object.class.reflect_on_association(association).klass.new
  fields = f.fields_for(association, new_object, :child_index => "new_#{association}") do |builder|
    render(association.to_s + "_fields", :f => builder)
  end
  link_to_function(name, ("add_fields(this, '#{association}', '#{escape_javascript(fields)}')").html_safe)
end

由于它将在 Rails 4 中被弃用，我想摆脱使用 Unobustrive JS。怎么做呢？link_to_function