Rails - Dec 2005 - validates_numericality_of, :allow_nil => true

I''m trying to use validates_numericality_of on a form of mine, using
:allow_nil => true, but when I submit the form with nothing filled in I
still get the "is not a number" error.

Help?

--
seth at subimage interactive
http://www.subimage.com/sublog/


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FYI: I''m using this right now...

validates_format_of :account_number, :with => /([0-9]*)/

...but it''s just annoying me that validates_numericality_of
isn''t working as
advertised.

On 12/3/05, subimage interactive
<subimage-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:
>
> I''m trying to use validates_numericality_of on a form of mine,
using
> :allow_nil => true, but when I submit the form with nothing filled in I
> still get the "is not a number" error.
>
> Help?
>
> --
> seth at subimage interactive
> http://www.subimage.com/sublog/
>

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Sorry for all the spam...this works better

/^[\d]*$/


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subimage interactive <subimage@...> writes:
> I''m trying to use validates_numericality_of on a form of mine,
using
:allow_nil => true, but when I submit the form with nothing filled in I still
get the "is not a number" error.Help?

When you don''t fill in a field on a form, the value that gets passed to
your
controller is NOT nil--it''s an empty string, "" (omitting the
quotes, of
course). While it may seem pedantic, an empty string is still a string,
not a nil.

To test numericality and still allow the field to be empty you could do
something like this:
  validates_numericality_of :some_field,
                            :if => Proc.new {|c| not c.some_field.blank?}

--Forrest