: I've read on this list that it's recommended to use #IsDefined()# in place
: of #ParameterExists()#,
: but doesn't IsDefined assume the existence of the variable, and therefore
: doesn't check
: for the existence as does ParameterExists? CFPARAM? And why has
: ParameterExists become deprecated
: as a function anyway?
IsDefined() works very similarly to ParameterExists(). However, it's a bit
nicer in that IsDefined() takes a string rather than taking the variable
itself. That means that I can, for example, build the variable name and
store it in another variable, then check it. Okay, that wasn't very clear.
Therefore, an example is in order.
<cfset var = "record_" & dateformat(now(), "mmddyyyy")>
<cfif isdefined(var)>
..
is the same as
<cfif parameterexists(record_12272002)>
so with isDefined() you can look up dynamically generated variable names.
so,
isdefined("form.variable")
is equivalent to
parameterexists(form.variable)
: So...with that in mind, what's the best way to handle an Insert
: Query where
: checkboxes
: may or may not be checked on a form?
I just use a cfparam:
<cfparam name="checkboxfield" default="">
and now you just insert it. If there's something else you want to be
inserted if the box(es) is (are) unchecked, just put that in the default
value.
HTH.
--Ben Doom
Programmer & General Lackey
Moonbow Software
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|
Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4
Subscription:
http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribe&forumid=4
FAQ: http://www.thenetprofits.co.uk/coldfusion/faq
Signup for the Fusion Authority news alert and keep up with the latest news in
ColdFusion and related topics. http://www.fusionauthority.com/signup.cfm
