Just off the top of my head and never done it but... could you reuse
the params value to repopulate the field if the field has errors? I
think it should be possible. Something like:

unless @your_object.save
  @your_object.your_attribute = params[:your_object][:your_attribute]
if @your_object.errors.on @your_object.your_attribute
  render...
end

The syntax might be off but you should get it right easily if that's
the case.

On Sep 14, 11:05 am, jdc <[email protected]> wrote:
> I've noticed that if I use the numericality validator and the user
> enters, for example "1234ABCD" it'll come back with a "not a number"
> error, but it then fills the input box with "1234", discarding the non-
> numeric input the user originally put in.
>
> I've seen a similar question about this in this group, but the poster
> was looking for a way to completely blank the number upon return.  I
> want something different - I'd like the original value to be
> displayed, which seems more logical to me.
>
> What worries me about having it auto-strip the non-numeric stuff is,
> if a user has a couple of validation problems in the form, they may
> fix other ones, not noticing the numeric, which will now happily post
> because it's been turned into a number automagically by Rails - and
> maybe not the number that was intended.
>
> I'm afraid it may be impossible since I think it's actually the input
> parser doing this and not the validator, but does anyone know how to
> make the original value come back instead of the parsed?
>
> Thanks in advance.
>
> jc

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