Rails - Apr 2008 - validates_presence_of Date with '00' year fails

Hi there

I''ve come across an interesting scenario with validates_presence_of
and Dates in Rails. I''ve been looking through the Rails code but I
just can''t figure out where in Rails the date parsing which presumably
causes this issue is happening.

The problem is this.  If you try and create a model using a date
string in the format "dd MMM yy" but you specify a year of
''00'',
''validates_presence_of'' fails because the Date object Rails
converts
the String to is nil.  If you specify any other 2-digit year it''s
fine. Here''s a simple example test case:

class Model
	validates_presence_of :dated_on
end

# this works
m = Model.create(:dated_on => ''20 Apr 01'')
assert m.errors.empty?

# this fails
m = Model.create(:dated_on => ''20 Apr 00'')
assert m.errors.empty?

Has anyone come across this before and/or would anyone be able to
point me to where in the Rails code base the date is parsed so I can
look at implementing a workaround?  I just can''t spot it!

Many thanks
Olly
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Ultimately, the parsing of a date comes down to the new_date method in
activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb.
It''s currently on line 166 of that file in edge Rails. That method
returns
nil if the year is 0. I don''t know why it works that way, but at least
you
now know why you see the behavior that you do.

Regards,
Craig

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