How do I add two weeks to Time.now?

Question

How can I add two weeks to the current Time.now in Ruby? I have a small Sinatra project that uses DataMapper and before saving, I have a field populated with the current time PLUS two weeks, but is not working as needed. Any help is greatly appreciated! I get the following error:

NoMethodError at / undefined method `weeks' for 2:Fixnum 

Here is the code for the Model:

class Job   include DataMapper::Resource    property :id,           Serial   property :position,     String   property :location,     String   property :email,        String   property :phone,        String   property :description,  Text   property :expires_on,   Date   property :status,       Boolean   property :created_on,   DateTime   property :updated_at,   DateTime    before :save do     t = Time.now     self.expires_on = t + 2.week     self.status = '0'   end end 

Answer 1

You don't have such nice helpers in plain Ruby. You can add seconds:

Time.now + (2*7*24*60*60) 

But, fortunately, there are many date helper libraries out there (or build your own ;) )

Answer 2

Ruby Date class has methods to add days and months in addition to seconds in Time. An example:

require 'date' t = DateTime.now puts t      # => 2011-05-06T11:42:26+03:00  # Add 14 days puts t + 14 # => 2011-05-20T11:42:26+03:00  # Add 2 months puts t >> 2 # => 2011-07-06T11:42:26+03:00  # And if needed, make Time object out of it (t + 14).to_time   # => 2011-05-20 11:42:26 +0300