formgen sample helper

gistfile1.rb

module FooSetupHelper
  def setup_foo(obj)
    obj.build_baz  if obj.baz.blank?
    obj.bars.build if obj.bars.empty?
    return obj
  end

  def build_select_list(assoc, options={})
    name  = options[:name]  || "name"
    scope = options[:scope] || "all"
    begin
      # name and id associations
      assoc.to_s.classify.constantize.send(scope).map{|a| [a.send(name), a.id]}
    rescue
      # use id for text and value
      assoc.to_s.classify.constantize.send(scope).map(&:id)
    end
  end
end