From: enspired <jasonecartwright@...>
Date: 2005-10-30T13:07:07+09:00
Subject: easiest way to set future date

I need to calculate an end date based on a start date (Date.today + #
of trial days). Basically, the app allows different services to be
purchased for different durations. So one service might be a year while
another might be 6 months. What's the best way to accomplish this,
keeping in mind that service durations could be configured in days,
months or years (although I could just make it months if adhering to
YAGNI)?

def before_create
  # set service_start_date/service_end_date based on service_level
  trial_days = self.service_level.trial_days || 0
  start_date = Date.today + (trial_days * (24 * 60 * 60))
  duration = self.service_level.duration # number of units * frequency
  frequency = self.service_level.frequency # can be 'D', 'M', 'Y'

  # determine end_date
  #end_date = start_date (???)

  self.service_start_date = start_date
  self.service_end_date = end_date
end