ruby-on-rails – Rails – 使用params中的run_at /指定何时发布

class MyController < ApplicationController

  def new_checkin
    # default venue is "SubMate"
    @venue_id = params[:venue_id] || "4c2c3acd8abca59355760120"
    @time = params[:time]
    @checkin = Delayed::Job.enqueue(self.perform_checkin,:run_at => @time.minutes.from_now)
  end

  def perform_checkin
    foursquare.checkins.add(:venueId => @venue_id,:broadcast => "private")
  end

结果很奇怪：delayed_job是保存,执行操作(没有请求的@time延迟),我仍然收到错误：

ArgumentError in MyController#new_checkin
  Cannot enqueue items which do not respond to perform

我错过了什么？如何在用户请求延迟的情况下执行此延迟作业？

谢谢！

UPDATE
感谢下面的@Roman,不知道你可以传递参数来延迟：

def new_checkin
  @venue_id = params[:venue_id]
  @time = params[:time]
  @checkin = self.perform_checkin
end

def perform_checkin
  foursquare.checkins.delay({:run_at => @time.minutes.from_now}).add(:venueId => @venue_id,:broadcast => "private")
end