How about something like this when calling your function
<cftry>
<cfoutput>
#setDateOfBirth('qasim')#
</cfoutput>
<cfcatch type="coldfusion.runtime.UDFMethod$InvalidArgumentTypeException">
<cfdump var="#cfcatch#">
</cfcatch>
</cftry>
On Thu, 12 Aug 2004 04:24:39 +0200, Nando <[EMAIL PROTECTED]> wrote:
> One of the reasons i've heard put forth to justify using getters and setters
> in an object is type validation. So for instance, let's say we've got a
> setter for dateOfBirth and we type the argument to be "date" so that only
> valid dates can be passed into the setter.
>
> <cffunction name="setDateOfBirth" access="private" returntype="VOID"
> output="false">
> <cfargument name="dateOfBirth" type="date" required="true" />
> <cfset variables.instance.dateOfBirth = arguments.dateOfBirth />
> </cffunction>
>
> So far, so good.
>
> Now what would be best practice to handle the case when the incoming
> argument isn't a valid date? To those in the know, excuse my trial and error
> here, but i've not attempted anything in this direction.
>
> Attempt 1:
>
> <cffunction name="setDateOfBirth" access="private" returntype="VOID"
> output="false">
> <cftry>
> <cfargument name="dateOfBirth" type="date" required="true" />
> <cfset variables.instance.dateOfBirth = arguments.dateOfBirth />
> <cfcatch type="Any">
> <cfset variables.invalidFields =
> listAppend(variables.invalidFields,"dateOfBirth") />
> </cfcatch>
> </cftry>
> </cffunction>
>
> Result - can't instantiate the object because of the <cftry> tag at the top
> of the function - "Context validation error for tag cfargument. The tag
> must be nested inside a CFFUNCTION tag."
>
> Attempt 2:
>
> <cftry>
> <cffunction name="setDateOfBirth" access="private" returntype="VOID"
> output="false">
> <cfargument name="dateOfBirth" type="date" required="true" />
> <cfset variables.instance.dateOfBirth = arguments.dateOfBirth />
> </cffunction>
> <cfcatch type="Any">
> <cfset variables.invalidFields =
> listAppend(variables.invalidFields,"dateOfBirth") />
> </cfcatch>
> </cftry>
>
> Result - the try - catch block is ignored, the error isn't handled, and we
> get an error screen announcing that "The argument DATEOFBIRTH passed to
> function setDateOfBirth() is not of type date."
>
> Anyone have a suggestion how to handle type validation situations like this
> seamlessly? My workaround is just to set the argument type to string, let
> the invalid date in, and then deal with it in the validate method.
>
> Thanks,
> Nando
>
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