From: Yaxm Yaxm <snowstorm+rubyforum@...>
Date: 2007-04-30T09:35:06+09:00
Subject: how to represent Date before epoch as a integer

Hi,

I provide a people search function that a user can specify a age range.
I use acts_as_ferret for the search.

I'd like to represent a user's birth date as a integer number, so that I
can tell Ferret to do the comparision easily.


#calculate birth date based on the given age
  def self.birth_date(age)
    born = Date.today
    Date.new(born.year - age, born.month, born.day)
  end

# get the birth date of the user that's 50 years old
User.birth_date(50).to_time

But I got this error:
ArgumentError: argument out of range
        from
C:/InstantRails-1.6-win/ruby/lib/ruby/gems/1.8/gems/activesupport-1
.4.1/lib/active_support/core_ext/date/conversions.rb:29:in `local'
        from
C:/InstantRails-1.6-win/ruby/lib/ruby/gems/1.8/gems/activesupport-1
.4.1/lib/active_support/core_ext/date/conversions.rb:29:in `send'
        from
C:/InstantRails-1.6-win/ruby/lib/ruby/gems/1.8/gems/activesupport-1
.4.1/lib/active_support/core_ext/date/conversions.rb:29:in `to_time'


I think the time can't be before unix epoch
time(http://en.wikipedia.org/wiki/Unix_epoch it is the number of seconds
elapsed since midnight UTC of January 1, 1970, not counting leap
seconds. )


Please advice how I can get around this limitation.

Thanks.
Yaxm

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