如何使“编辑post”方法在Rails中只有10分钟可用？

# Post模型中添加edit_token字段
class Post < ActiveRecord::Base
  before_create :generate_edit_token

  private

  def generate_edit_token
    self.edit_token = SecureRandom.hex(10)
  end
end

# PostsController中编辑post的方法
class PostsController < ApplicationController
  def edit
    @post = Post.find(params[:id])
    edit_token = params[:edit_token]

    if @post.edit_token == edit_token && Time.now - @post.created_at < 10.minutes
      # 允许编辑
    else
      flash[:error] = "编辑链接已失效，请重新获取编辑权限。"
      redirect_to root_path
    end
  end
end