cffunctions

[celery6541]

Hi all,

I am using a function to check two dates to make sure that an end date comes after a start date. Right now I am trying to call it like this

<cfset date_check=check_date(#Form.startDate#,#Form.endDate#)>
<cfoutput>#date_check#</cfoutput>
<cfif NOT isDefined("date_check")>
    <li>Please make sure the end date comes after the start date.</li>
</cfif>
 

and my function is

<cffunction
    name="check_date"
    return type="boolean">
 
    <cfargument
        name="start_date"
        type="date"
        required="yes">
    <cfargument
        name="end_date"
        type="date"
        required="yes">
 
    <cfif start_date lt end_date>
        <cfset return_value=true>
    <cfelse>
        <cfset return_value=false>
    </cfif>
 
    <cfreturn return_value>
</cffunction>
 

the cfoutput is showing the correct true/false values being produced by the function but the cfif statement isn't executing when date_check is false. Am I using the boolean evaluator incorrectly? Also, is there a way to put the function call into the IsDefined function? I tried IsDefined("check_date(#Form.startDate#,#Form.endDa te#)") but that gave me an error.

Thanks.

[acoder]

Don't use isDefined. That's to check if the variable is defined which it obviously is. You need to check if it's false.

Try

<cfif date_check IS FALSE>