IsValid - CFMX 7 Little Things

coldfusion

ColdFusion MX 7 added a new function called IsValid. The IsValid function performs data validation just like the CFPARAM tag, and supports all the new data types in cfparam (see my previous post) as well.

For instance if we want to validate the a variable has an integer value:

<cfif IsValid("integer", url.value)>
	Valid integer!
<cfelse>
	Invalid Integer!
</cfif>

For a range:

<cfif IsValid("range", url.value, 1, 100)>
	Value is between 1 and 100
<cfelse>
	Value is not between 1 and 100
</cfif>

And for regular expressions:

<cfif IsValid("regex", url.value, "[A-Z][a-z]+")>
	Word starts with a capital letter
<cfelse>
	Word does not match pattern.
</cfif>


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Comments

On 02/10/2005 at 11:35:42 PM EST Raymond Camden wrote:
1
Hmm - according to the docs - the regex is a JS regex, not a CF regex. Anyone know why?

On 02/11/2005 at 7:30:05 PM EST Pete Freitag wrote:
2
According to Ray's post on his blog, it does infact use CF Regex.

http://ray.camdenfamily.com/index.cfm?mode=entry&entry=02586859-DBB8-5F75-494E8BC257561C56

On 02/13/2005 at 12:16:18 PM EST Pete Jordan wrote:
3
CF and JS regexen are both POSIX, no? And neither support the single most useful (and simplest to implement) Perl extension though - lazy matching.

Either way, that regexp wants a leading "^"...

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