Why does Date.yesterday counts as Date.today also?

Question

I have the following model and methods:

class UserPrice < ActiveRecord::Base
  attr_accessible :price,  :purchase_date,    

  def self.today
    where(:p         


        

Answer 1

If you use the Time class, you'll have access to UTC (or "zulu") time zone rather than using the environment's time zone in Date class.

class UserPrice < ActiveRecord::Base
  attr_accessible :price,  :purchase_date,    

  def self.today
    where(purchase_date: today_utc_date)
  end

  def self.yesterday
    where(purchase_date: today_utc_date.yesterday)
  end

  private

  def today_utc_date
    @today ||= Time.zone.today
  end
end

Also, if you need to process an outside date, for example params[:purchase_date]:

Time.parse(params[:purchase_date]).utc.to_date