From: "Schüle Daniel" <uval@...>
Date: 2006-03-30T07:28:42+09:00
Subject: Re: %r regex matching is ignoring my leading zeros

Dara Sanderson schrieb:
> Hello,
> 
> I hope someone can help me or at least confirm that I'm not going 
> insane.
> 
> I have a model in which I'm trying to validate information before it 
> saves.
> One particular field is for and expiration date.  The code in my model 
> to do the validation looks like this:
> 
>  validates_format_of :expiration,
>                      :with       => %r{^[\d]{4,4}$},
>                      :message    => "must be formatted (mmyy)"
> 
> 
> The problem is if someone enter a date that starts with a zero like 
> "0309"  The validation somehow just doesn't "see" the leading zero and 
> keeps returning an error as though the user isn't submitting it 
> properly.  I did verify that the controller is definetly sending all 
> four digits in the post.
> 
> I tried different combinations like: r{^(0|1)[\d]{3}$} but no matter 
> what I did the zero was ignored.  I finally had to change it to look for 
> 3 or 4 digits just to make it work but that of course isn't proper 
> validation as my submissions must have 4 digits.
> 
> Can anyone help me?  Am I going crazy here?
> 
> Thanks,
> Dara
> 

i am not an expert in RE but don't you think [\d]{4,4} should be
\d{4,4}

inside a class [] . and i think \ lose their special meaning


hth, Daniel