Thanks for your reply Isaac. Ben Doom actually had the answer.
I was using ^\d\d\/\d\d\/\d\d\d\d?$ and should have been using
^(\d\d\/\d\d\/\d\d\d\d)?$
If I do:
<cfinput type="text"
name="myDate"
validate="regular_expression"
pattern="^(\d\d\/\d\d\/\d\d\d\d)?$"
>
It will allow null (empty field) and a valid US date mm/dd/yyyy (with the
exception of actually checking to make sure the month is 1-12 and the day is
1-28,1-30 or 1-31 for the day depending on the month).
CF for the validate regular_expression is using JavaScript RegEx, it
outputs:
function _CF_checkregex(object_value, regex) {
//Returns true if the value matches the Regular Expression passed in.
return regex.test(object_value);
}
============================================
Bryan F. Hogan
Director of Internet Development
Macromedia Certified ColdFusion MX Developer
Digital Bay Media, Inc.
1-877-72DIGITAL
============================================
-----Original Message-----
From: S. Isaac Dealey [mailto:[EMAIL PROTECTED]]
Sent: Monday, January 20, 2003 2:09 PM
To: CF-Talk
Subject: Re: input regex validate
> : I have a date form field which I have attempted to
> : validate using CF's validate="date"
> :
> : Which should allow mm/dd/yyyy but it also allows
> : mm/dd/yyy
> :
> : I tried to work around this by setting my validate
> : to regular_expression with a pattern of
> : ^\d\d\/\d\d\/\d\d\d\d$ which works perfect except
> : for the fact that I also want this to allow nulls.
\d isn't a character class in CF 5 -- it's a new thing in regex for CFMX. So
I'm baffled as to how \d works if you're using CF 5...
> Does anyone have a regular expression that will check
> for mm/dd/yyyy and allow nulls?
what exactly is a null in this context? CF doesn't have nulls. At least it
didn't in CF5 and prior.
> docs state that the validate="date" only accepts
> mm/dd/yyyy but the example on the docs validates
> against mm/dd/yy I know this is a valid date.
> Just pointing this out because the docs are wrong,
> and I did not want to see RTFM in any replies I
> may get. Also this has to be done on the client
> side. I'm using CF5 for this. Docs came from DMX.
I don't remember if CF 5 allows regex to validate input fields (I avoid
cfform generally). If so you'll have to fall back to ranges and/or the posix
character class [:digit:] from cf5 which will be CF 5/MX compatible for when
you migrate to MX. Using a more complex regex will also allow you to
recognize a date value more accurately, for instance, the value for month
must be (0[1-9]|1[0-2]) whereas the value for date must be
(0[1-9]|[12][0-9]|3[0-1]) -- granted, this doesn't account for the precise
number of days in the month or leapyear, etc. but it will often tell you if
the month and day have been reversed.
^(0[1-9]|1[0-2])\/(0[1-9]|[12][0-9]|3[0-1])\/([1-2][09][0-9]{2,2})$
longer, but more precise...
Also -- if you need to do a lot of client-side validation, you might check
out the qForms open-source API http://www.pengoworks.com ... It has a
validateDate() function that should work the way you want/need it to, plus a
lot of other really nice features.
> : Maybe someone could explain why the validate="date"
> : allows : mm/dd/yyy I don't think that is a valid date,
> : am I wrong?
Yep, it's a date... 1/1/1 is a date (presumably the date of christ's birth
or resurrection -- not sure, I don't know why we reordered our callendar
after him. In any event, then presumably 1/1/10 and 1/1/100 are also dates
-- validate="date" (i'm not looking at the docs) may or may not require
preceding zeroes. -- or it could be that they intended it to require
preceding zeroes and it is a bug, though I remember a while back reading in
the doc's for CF 3 that only 2 digits were required (with certain
assumptions about the century based on those 2 digits). So if you added a
3rd digit, that would just qualify the century.
s. isaac dealey 954-776-0046
new epoch http://www.turnkey.to
lead architect, tapestry cms http://products.turnkey.to
tapestry api is opensource http://www.turnkey.to/tapi
certified advanced coldfusion 5 developer
http://www.macromedia.com/v1/handlers/index.cfm?ID=21816
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