CFFORM and CFC usage

Report · Feb 02, 2009

I have form that is calling itself for submission, and at the top of the
form, I have:

<cfif structkeyexists(url,"m")>
<cfswitch expression="#m#">
<cfcase value="0">
<cfinvoke component="compoents.post" method="infoMail">
<cfinvokeargument name="fName" value="#form.fName#">
<cfinvokeargument name="lName" value="#form.lName#">
<cfinvokeargument name="Address1" value="#form.Address1#">
<cfinvokeargument name="Address2" value="#form.Address2#">
<cfinvokeargument name="City" value="#form.City#">
<cfinvokeargument name="State" value="#form.State#">
<cfinvokeargument name="Zip" value="#form.Zip#">
<cfinvokeargument name="Plus4" value="#form.Plus4#">
<cfinvokeargument name="Email" value="#form.Email#">
<cfinvokeargument name="Info" value="#form.Info#">
<cfinvokeargument name="Events" value="#form.Events#">
<cfinvokeargument name="Class" value="#form.Class#">
<cfinvokeargument name="News" value="#form.News#">
</cfinvoke>
</cfcase>
<cfcase value="1">

</cfcase>
</cfswitch>
</cfif>

The problem is that if a checkbox on the form isn't selected, then I get:

Element EVENTS is undefined in FORM

How can I get around this?? On the CFC I have it setting a default
value of 0, and it isn't required.....

Report · Feb 02, 2009

Steve G wrote:
>
> The problem is that if a checkbox on the form isn't selected, then I get:
>
> Element EVENTS is undefined in FORM
>
> How can I get around this?? On the CFC I have it setting a default
> value of 0, and it isn't required.....

That is a standard problem with the HTTP standard and the check box and
radio button controls. If they are not selected no key is sent to the
server. Your default in the CFC is not working because the code is
failing when trying to use the non-existent 'form.events' value in the
<cfinvokeargument...> tag. You just have to code your form handler page
to understand this might be so. The two most common solutions to this
is to check for the existence of the field OR to default it to some value.

The struckKeyExists() function works well to test for the existence of
form fields as the form and url variables are structures.
I.E.
<cfif structKeyExists(form,"Events")>
<cfinvokeargument name="Events" value="#form.Events#">
</cfif>

The <cfparam...> tag is designed to provide a default value to something
if it does not exists.
I.E.

<cfparam name="form.events" default="0">

Report · Feb 02, 2009

> The problem is that if a checkbox on the form isn't selected, then I get:
> Element EVENTS is undefined in FORM

That has nothing to do with your cfc. You cannot use an variable that is not defined. The usual solutions are to set a default with cfparam or include the variable conditionally:

<cfif structKeyExists(form, "event")>
do something
<cfelse>
do something else
</cfif>

Or just pass in all of the arguments at once using "argumentCollection":

<cfinvoke .... argumentCollection="#form#" />

Report · Feb 02, 2009

You are checking for the existence of a url variable and then trying to process form varialbles.