Using IsDefined()

I have a web app that deals with both authenticated users (who log in via a central login) and unauthenticated ones.
For the authenticated ones, I call a web service that returns an XML file. I'm using this code:
<cfif IsDefined("session.loginauth")>
    <cfset session.logincreds = XMLParse(session.loginauth)>
        <cfset session.userid = session.logincreds.user.row[1].user_id.XmlText>
        <cfset session.rights = session.logincreds.user.row[1].user_type.XmlText>
        <cfset session.usernm = session.logincreds.user.row[1].name_first.XmlText & " " & session.logincreds.user.row[1].name_last.XmlText>
</cfif>
It works fine for authenticated users, but fails for unauthenticated ones. The error is on the line with the XMLParse(). It's like the IsDefined isn't working and the code within the cfif is firing no matter what.
I've tried cfparam'ing that session variable like this:
<cfparam name="session.loginauth" default="">
Then:
<cfif session.loginauth neq "">
But that's no better.
Why on earth is that cfif always executing? If I dump session.loginauth when a user's not logged in, I get nothing.

BreakawayPaul wrote:
Well here's the thing. When a user logs in, I get an XML string from the authentication server, which I assign to session.loginauth. I do this using a cfinvoke tag that calls a web service.
When a user arrives without logging in, session.loginauth is null.
That is what I mean by the blessing in disguise. The code is telling you otherwise: session.loginauth exists. Perhaps initialized in onSessionStart?
What I want to do is only run the XML parse when session.loginauth contains the XML data from the authentication server, but it seems to run no matter what.
My understanding is that if I cfparam something (even to "") it''s then defined, so isDefined won't work. So I can either cfparam it to "" and test against "", or leave it alone and use IsDefined. Right now neither seem to work.
The code snippet I gave is a good workaround.
The odd thing is, this code has been working for over 2 months and just started to fail yesterday morning.
Right now my workaround is to wrap the cfinvoke and entire cfif block from my original post in a try/catch block, with the catch being empty. This seems to avoid the error message for non logged in users. But I still can't figure out why <cfif IsDefined("foo") runs when foo isn't defined. Or at least I don't see how or where it's defined.
Then it means that, yesterday morning, something happened to the code to make session.loginauth exist for unauthenticated users. As Sherlock Holmes said, "When you have eliminated the impossible, whatever remains, however improbable, must be the truth".
I used to use StructKeyExists() all the time, but for some reason a bunch of the apps I used it on started throwing errors. Having all these dissimilar systems having to talk to each other is a real challenge. A few years ago I had standalone systems using cflogin and had zero problems, but now I have to use these web services, and it's introduced elements that I can't control as well.
Perservere. Software integration is always a challenge. On the plus side, it makes your system infinitely more scalable than cflogin would.

Similar Messages

Using isDefined within a cfloop

I am trying to check a number of submitted form fields. The
forms fields are numbered Q11, Q12, Q13, Q14, etc. Rather than do a
set of steps for each form field, I'm trying to do it with cfloop.
I have it set up as:
<cfloop index="i" from="1" to="20">
<cfif isDefined('form.Q1i')>
Do this stuff
</cfif>
</cfloop>
I don't get any errors, but it also is not processing the 'Do
this stuff'. I've tried changing the format; ('form.Q1' & #i#,
and 'form.Q1' & i, and others. Then I get error messages.
Any clues to the problem?

>> This code Does Not [work]
That is because when using isDefined() the values *must*
reside within quotes inside the function. So,
isDefined("form.Q12#i#") is valid where isDefined('form.Q12' &
i) is not (the string "& i" is outside the required quotes).
Also, your reference to the unknown variable name is
incorrect. Since *i* is a dynamic variable that you are saving to
the name of another variable you'd need to reference it as
something like "form.Q12#i#" where *FORM.Q12" is the string and *i*
is the dynamic value.
So, using your code as a base to work from, try this:
<cfloop index="i" from="1" to="20">
<cfif isDefined("form.Q12#i#")><cfset Q12Temp =
Q12Temp & ", " & "form.Q12#i#" /></cfif>
</cfloop>
Or to be a little cleaner, try this:
<cfloop index="i" from="1" to="20">
<cfif structKeyExists(form, "Q12#i#")><cfset Q12Temp
= listAppend(Q12Temp, "form.Q12#i#") /></cfif>
</cfloop>

Using isDefined for a dynamic struct?

I know how you can check for a defined variable or object using isDefined("myVar"), but I have a struct that can have varying properties. While I can explicitly write out the "myStruct.myProperty" checks in quotes for this method, I'd like to put these into a function where a variable is passed into it.
Is this possible? Basically, I'm populating form fields and some fields may not be defined yet. Thoughts? Thanks.
Ryan

Thanks for the help BTW. I'm still new to CF, I'm more of a .net guy.
Basically, I have this. It's a form that edits and adds bios for members:
objStatement = objConnection.PrepareStatement("select bio_first_name, bio_last_name from cpppeBios where bio_id = ?");
objStatement.setInt(1, Int(FORM.edit_bio_id));
objResults = CreateObject("java", "coldfusion.sql.QueryTable").Init(objStatement.ExecuteQuery());
EditBio = structNew();
EditBio = objResults;
....and, I have input fields down below...
<input type='text' value='' />
I use the same form for adding and editing bios. What is the best approach for handling populating of these fields when the EditBio object can be null or contain data. I would access the data using EditBio.bio_first_name, etc.
Thanks again.

Isdefined issue

Hello,
I just upgraded from cf5 to cf8. I have some code that was
working but now isn't. Specifically I have a cfoutput
query="xxxxxxx" and within that tag I have some IFs that use
isdefined().
Example:
#isdefined("form.unitprice_"&trim(getprods.id))#
This used to evaluate to true but now evaluates to false. If
I put the evaluated value above the cfoutput it does evaluate to
true.
Further I even tried putting the evaluated value inside the
cfoutput but it still does not work.
Example:
#isdefined("form.unitprice_1026")#
With debugging set to on I can see the different form fields
that are returned on the page and they are there. Furthermore If I
dump form.fieldnames I get the list that includes the ones in
question.
I also noticed that I can reference the form fields without
the "form." but only within the cfoutput.
Very weird. Any help would be greatly appreciated.
Thank you.

Ok, very weird. I stripped the code down to the basics to see
if I can reproduce the problem. If I do a simple query against the
original table I can reproduce the problem. If I change the name of
the table to another table, it does work. The code is below. The
database is SQL server. Obviously the issue seems to be something
in the database. However:
1. The code worked fine in CF5
2. In the code below I am not referencing any fields in the
table
3. Both tables are rturning one record as per the MAXROWS
setting
The table that doesn't work is named offerings2
The table that does work is named units
I've uploded to very simple pages with the code below and
referencing both tables:
http://darkeffigy.com/test_offerings2.cfm
http://darkeffigy.com/test_units.cfm
--------BEGIN CODE--------
<CFQUERY NAME="getdata"
DATASOURCE="#trim(user_datasource)#" USERNAME="#trim(dsn_uname)#"
PASSWORD="#trim(dsn_pword)#" MAXROWS="1">
select * from offerings2
</CFQUERY>
<CFIF #isdefined("form.the_form_field")#>
<HR>ISDEFINED OUTSIDE THE CFOUTPUT<HR>
</CFIF>
<CFOUTPUT QUERY="getdata">
<HR>REGULAR ROW OF OUTPUT<HR>
<CFIF #isdefined("form.the_form_field")#>
<HR>ISDEFINED INSIDE THE CFOUTPUT<HR>
</CFIF>
</CFOUTPUT>
<FORM ACTION="test_offerings2.cfm" NAME="foreform"
METHOD="POST" ENCTYPE="multipart/form-data">
<INPUT TYPE="text" NAME="the_form_field"
VALUE="ABCDEFG">
<INPUT TYPE="submit">
</FORM>
--------END CODE--------
Thank you

Is my cfif IsDefined being ignored?

I have a form that allows a user to upload up to 3 images.
They don't need to upload all three. For example, I get an error if
I don't upload all three images.
Despite having a <cfif> that uploads only if an image
if the field name is defined, I still get a "The form field Image2
did not contain a file" error. It seems my <cfif> is being
ignored and trys to upload a field that is not defined? Any ideas?
Thanks Rick
FORM PAGE
form action="act_uploadimage.cfm" method="post"
enctype="multipart/form-data">
<input type="file" name="Image1" >
<input type="file" name="Image2" >
<input type="file" name="Image3" >
<input type="submit" name="Submit" value="Upload">
ACTION PAGE
<cftransaction>
<cfquery name="Product" datasource="wioDB">
SET NOCOUNT ON;
INSERT INTO Products (CatID, USerID, Designer, Model, Color,
DressSize, Price, Material, Description)
VALUES ('#Trim(FORM.CatID)#',
'#Trim(SESSION.Auth.UserID)#',
'#Trim(FORM.Designer)#',
'#Trim(FORM.Model)#',
'#Trim(FORM.Color)#',
'#Trim(FORM.DressSize)#',
'#Trim(FORM.Price)#',
'#Trim(FORM.Material)#',
'#Trim(FORM.Description)#');
SELECT @@identity AS ProdID FROM Products;
</cfquery>
<cfif isdefined("form.Image1")>
<cffile action="upload" filefield="Image1"
destination="D:\inetpub\woreitonce\users\uploads\"
nameconflict="makeunique" accept="image/*" >
<cfquery datasource="wioDB">
INSERT INTO Images (ProdID, Image, IsPrimary)
VALUES (#Product.ProdID#,'#file.ServerFile#',
'#FORM.IsPrimary#')
</cfquery>
</cfif>
<cfif isdefined("form.Image2")>
<cffile action="upload" filefield="Image2"
destination="D:\inetpub\woreitonce\users\uploads\"
nameconflict="makeunique" accept="image/*" >
<cfquery datasource="wioDB">
INSERT INTO Images (ProdID, Image, IsPrimary)
VALUES (#Product.ProdID#,'#file.ServerFile#',
'#FORM.IsPrimary2#')
</cfquery>
</cfif>
<cfif isdefined("form.Image3")>
<cffile action="upload" filefield="Image3"
destination="D:\inetpub\woreitonce\users\uploads\"
nameconflict="makeunique" accept="image/*" >
<cfquery datasource="wioDB">
INSERT INTO Images (ProdID, Image, IsPrimary)
VALUES (#Product.ProdID#,'#file.ServerFile#',
'#FORM.IsPrimary3#')
</cfquery>
</cfif>
</cftransaction>

I have almost the same situation and when I changed my cfif
to check for blank, it worked.
So my question now is when are you suposed to use isDefined
and when are you suppose to check for blank ?
If a field in a form is left blank, does that mean that it
does not exists, therefore using isDefined, or does that mean that
it exists but contains a blank value ?
I have the following code below. The first one works and the
second one does not, but I changed it to check for blank and now it
works, so I am a little confused now. What does isDefine do and
when should it be used ?
<cfif isDefined("form.output_type")>
<cfset session.output_type = "#form.output_type#">
<cfelse>
<cfset session.output_type = "screen">
</cfif>
<cfif form.email_address is not "">
<cfset session.email_address = "#form.email_address#">
<cfelse>
<cfset session.email_address =
"[email protected]">
</cfif>
Thanks

Cfif vs isDefined vs cfparam

I am a little confused as to when I should use these tags. I
use isDefined to check for the existece of radio buttons and
checkboxes on forms, and I use cfif to check for values. But when
do I use cfparam ?
Can someone give me an example on when to use each ?
Thanks

Essentially, if you want to ensure that a variable is defined
or that a variable has a default value...you use cfparam. Lets say
that you have a variable that defines the content of your page. By
default, you want your site to load up body.cfm. You could set in
your index page, <cfparam name="bodypage"
default="body.cfm">.
Now, if you just want to check and see if a varaible is
present, you would use isdefined(). This coulkd be used for a wide
range of uses. I generally use it a lot in instances where there is
a varaible that may not exist (a prime exampole is varibles that
may come in via a form, or a url)...
<cfif isdefined("form.name")>
<cfset varaibles.name="#form.name#">
<cfelseif isdefined("ur.name")>
<cfset variables.name="#url.name#">
<cfelse>
<cfset variables.name="">
</cfif>
Now the above examples can make use of both...
<cfparam name="variables.name" default="">
<cfif isdefined("form.name")>
<cfset varaibles.name="#form.name#">
<cfelseif isdefined("ur.name")>
<cfset variables.name="#url.name#">
</cfif>
In the above, variables.name was already defaulted to "" so
there was no need to put the default if statement in (no real
benefit to doing it this way...just an example). I also use this a
lot when I have a page that has content that changes based on group
id or user id. I like to put isdefined in the logic to make sure
that the variable has defined already for exception handling
purposes. <cfif isdefined("variables.group_id") and
variables.group_id eq 5>...then I use a default cfelse to cover
the event that group_id has not been defined...
They both have very differnt uses that can even compliment
each other. The java code thqat is going on behind the scenes
checks to see if the variable has already been defined for cfparam.
That is the beauty of CF...thee is a lot that you don;t have to
program into your pages because theat functionality has already
been defined by CF,

Referencing field in a query struct

About 5% of the time I get an error 'Element COMPANYSTATUS is
undefined in Q.' from the code in SNIPPET 1. Can anyone tell me why
I would ever get this error? If the query returns 0 results (which
it may if the user is not logged in and SESSION.User.GetCompanyID()
return 0) it should return false since q.RecordCount is 0. The
problem is I know users in at least some cases are logged in and
the query is returning at least one row. The IF statement should
short circuit on the record count if its 0. If it doesn't then the
comparison for q.CompanyStatus should always be valid. Does any
know why CF flakes out occasionally when referencing
q.CompanyStatus? I see this in other areas as well such as in
SNIPPET 2. The method is called from another CFC where I can
guarantee the passed argument '_company_id' is valid integer and
the SQL should always return 1 result. Why then do I get the error
'Element STATE is undefined in Q.' Is it bad practice referencing
query fields this way?
Thanks In Advance

No. The cftry/cfcatch was for catching database errors.
However, you may wish to let those bubble up.
Since the component exists in a shared scope, using
IsDefined() is potentially dangerous IMO. If you do not include a
scope, CF automatically searches multiple scopes for the given
variable name. So I would use structKeyExists instead.
(Coincidentally a similar topic came up on HOF today)
I would do something like this
<cfset var Local = structNew()>
<cfquery name="Local._SqlQuery"
datasource="#APPLICATION.config.DSN#">
#preserveSingleQuotes(ARGUMENTS._sql)#
</cfquery>
<cfif structKeyExists(Local, "_SqlQuery")>
<cfreturn Local._SqlQuery>
<cfelse>
<cfreturn false>
</cfif>
....

Reloading the same page

I know this is surely a very retarded question, but I am
tired of looking about and trying to get the proper answer on my
own; I have a form that enters information into a database. what I
want is to have it reset and reloaded each time submit is pressed
instead of getting the blank page. Thanks In advance!.

When I do forms with db actions, I always make the form
action #cgi.script_name# and just do the action on the form page,
using isdefined() to check for the existence of the form
submission.
If you're pre-populating the form with info from the DB, put
the query to get those details *after* you do your insert, outside
the cfif isdefined(), but before the form. That way, regardless of
whether or not the page is being view before or after the form
submission, you're still getting it pre-populated.

Fk error display on Action page

I have a page that displays the content of a table. If you select one of the items and hit submit, it will navigate to another page that will allow you delete this item. Once the user hits delete the user is directed back to the page that displays the content of the table. If there is a fk error that needs to be displayed, is there a way to show this error on the page that displays the content of the table and not the page that has the delete button after the user hits the delete button?
Thanks,
Tim

First, I would not be using ParameterExists as this function
has been deprecated since CF 6 I believe and might not work in
later releases, use IsDefined("Add") instead.
Now on to your question, you cannot insert any values into
fields such as autonumber or "auto identity" fields, the database
inserts these values themselves when a new record is created.
For this purpose I would not use <cfinsert, instead use
<cfquery to insert into your database.
<cflock timeout="30" throwontimeout="yes"
name="InsertIntoConf2007Registration" type="EXCLUSIVE">
<cftransaction>
<cfquery name="Insert" datasource="DSSurvey">
INSERT INTO Conf2007Registration (Name, Email, County, Title,
Phone, Address1, Address2, PO, CityStateZip, Guests, Golfyes,
Company, Allergies, Vegie2, Social, Comments)
VALUES ('#form.Name#', '#form.Email#', '#form.County#',
'#form.Title#', '#form.Phone#', '#form.Address1#',
'#form.Address2#', '#form.PO#', '#form.CityStateZip#',
'#form.Guests#', '#form.Golfyes#', '#form.Company#',
'#form.Allergies#', '#form.Vegie2#', '#form.Social#',
'#form.Comments#')
</cfquery>

<cfquery name="GetNewID" datasource="DSSurvey">
SELECT @@identity AS TheNewlyInsertedID
FROM Conf2007Registration
</cfquery>
<cfoutput>
Your registration number is #GetNewID.TheNewlyInsertedID#
</cfoutput>
</cftransaction>
</cflock>

Cfselect and cfloop help

I am working on an event calender application. What I am
trying to achieve is to have 2 drop down lists with the months of
the year in them. I want the selection from the first list field to
define the starting point for the second list field. For example.
The first choice from the 12 months is March. So I want the second
box, located on the same page, to have from March to December as
options. Then there is a submit button.
Then, below, on the same page, I would like to have a dynamic
calender generated for the events between the months selected from
the form. I have the calender section completed using a db query to
populate the table with the events.
I can get this to mostly work by having the form on one page
submit to the calender on another page though I cannot get the
second list field to update based on the value passed from the
first list field, I would really like this to work on a single page
so that the user can resubmit different date combinatons on the
fly.
Any help anyone can provide me with would be greatly
appreciated. Thanks in advance.

Ok..i have the page working almost completely right now.
I used IsDefined("Form.Submit"> in a <CFIF>
<CFELSE> statement to get the form to submit the results to
the same page, then i added a second copy of the form to the top of
the reselts section of the calender so that the form is always
present for use on the page.
The only thing I need help with now is making the second list
box update it's choices from the selection of the first list box in
the same form. Any ideas?
I can post code iff it will help any, but it is getting
rather lengthy.

Dynamic query, where clause help

Hi Folks,
Using my code below to generate a query.
When using more than one condition, I'm not sure how to work out where the AND goes.
Can anyone please help?
Thankyou
WHERE
<cfif stafffilter neq "">
deviceofficer = #stafffilter#
</cfif>
<cfif assetid neq "">
AND deviceasset = '#assetid#'
</cfif>
<cfif isdefined("noasset")>
AND deviceasset = ''
</cfif>
<cfif isdefined("noserial")>
AND deviceserial = ''
</cfif>
<cfif serial neq "">
AND deviceserial = '#serial#'
</cfif>
<cfif servicearea neq "">
AND deviceservice = #servicearea#
</cfif>
ORDER by locationname

I do this sort of thing:
<cfset sWhereAnd = "WHERE">
<cfif isdefined("colFilter")>
     #sWhereAnd# col = #colFilter#
    <cfset sWhereAnd = "AND">
</cfif>
<cfif isdefined("someOtherColFilter")>
     #sWhereAnd# someOtherCol = #someOtherColFilter#
    <cfset sWhereAnd = "AND">
</cfif>
[etc]
(that's pseudocode... I'd never use isDefined() or not use a <cfqueryparam> tag for my parameter values).
I don't like doing the somewhat popular WHERE 1=1 approach as it can force a full table scan (all rows in the table will match that, and each WHERE filter expression is applied to every row of the table being filtered), unless the DB optimises it out as noise (which is what it is). To me it's using bad SQL to cut corners.
To be honest though, I shy away from these generic sort of queries these days. Most of the genericism never gets used, and more specific requirements are better implemented to meet the precise need.
Adam

Help Inserting a record

I have a access db and need to insert a record from a formmy
query isn't working, Can some one help?
Here is my query;
<form method=Post Action=doform.cfm>
<table border=0 cellspacing=5>
<tr>
<td valign="top"><span
class="t15">Issue:</span></td>
<td><textarea name="Issue" cols="60"
rows="5"></textarea></td>
</tr>
</table>
</form>
<CFQUERY NAME="InsertRecord"
DATASOURCE="AdminServerIssues">
Insert Into Issue (Issue)
Values ('#form.Issue#')
</CFQUERY>

tracjerian,
1. Add a "submit" button to the form
2. If you're using a self-posting form (ie the code is all in
one page named "doform.cfm"), the FORM.Issue variable only exists
after the form is submitted. Use IsDefined() to detect if
the form field exists and if it does, run the insert query.

Date field (not required) causing an error...Please assist!

Hello, I am a beginner when it comes to ColdFusion could someone please assist with this issue?
I have a date field in my application that is not required, I want users to have the choice to leave this field blank.
Below is a breakdown of what I have going on:
On Add/Edit page:
<cfinvoke component="test"
           method="get"
           ReferenceNumber="#URL.RefIDNum#"
           returnvariable="record">
<cfset ThisIsTheDateField=DateFormat(record.ThisIsTheDateField, "MM/DD/YYYY")>
<cfform action="process.cfm">
   <cfinput type="Text"
            name="ThisIsTheDateField"
            value="#ThisIsTheDateField#"
            message="ThisIsTheDateField must be a valid date"
            required="no"
                                        validate="date"
            validateAt="onSubmit"
            size="50"
            maxlength="10">
On process.cfm:
<cfinvokeargument name="ThisIsTheDateField"
                   value="#DateFormat(FORM.ThisIsTheDateField)#">
On CFC Page:

<cfargument name="ThisIsTheDateField"
              type="date"
              required="no"
              hint="ThisIsTheDateField field">
Query Value for this field:
#CreateODBCDate(ARGUMENTS.ThisIsTheDateField)#,
The error I get is:
Error Occurred While Processing Request
The THISISTHEDATEFIELD argument passed to the add function is not of type date.
If the component name is specified as a type of this argument, it is possible that either a definition file for the component cannot be found or is not accessible.
The error occurred in E:/site/test.cfc: line 56
54 :
55 : 
56 : <cffunction name="add"
57 :              returntype="boolean"
58 :              hint="Add a record">
I need a way to make this field accept blank entries... when I leave it blank I get the above error!
Thank you!

The cfif does not surround the cfargument. Put your cfargument for ThisIsTheDateField the same way you have it for your First/Second/Other Thing cfargument. Then, understand that even though you have a cfargument tag that is named "ThisIsTheDataField", that the variable "arguments.ThisIsTheDataField" doesn't necessarily exist (because you have defined the argument as optional). If it doesn't, you can't use it, otherwise you will get
Element THISISTHEDATEFIELD is undefined in ARGUMENTS.
So for the parts of your function where you will want to do something specific if the ThisIsTheDataField was passed to your function, you have to check using IsDefined("argument.ThisIsTheDataField") to determine if that variable exists or not. SO, to summarize using the example you supplied above:
<cffunction name="add"
             returntype="boolean"
             hint="Add a record">

<cfargument name="FirstThing"
              type="string"
              required="no"
              hint="First Thing">
<cfargument name="SecondThing"
              type="string"
              required="no"
              hint="Second Thing">
<cfargument name="ThisIsTheDateField"
              type="date"
              required="no"
              hint="ThisIsTheDateField field">
<cfargument name="Fourth Thing"
              type="string"
              required="no"
              hint="Fourth Thing">
<cfif IsDefined("arguments.ThisIsTheDateField")>
   
</cfif>
As an example, let us say that you want to have the date be a default value (say, today's date), if the date isn't passed to the function. You could do:
<cfif IsDefined("arguments.ThisIsTheDataField")>
    <cfset TheDateField = arguments.ThisIsTheDataField" />
<cfelse>
    <cfset TheDateField = Now() />
</cfif>
At the end of this code, the variable "TheDateField" will be guaranteed to have a date, and the date will be the date passed to the function if one was passed, or otherwise today's date if not.
I hope that clarifies everything!

Testing for abnormal disconnect

I maintain a VPN between two sites using the VPN Client 5.0.07.0290.
The clients are running on Windows server 2003.
The connection is started with a script using the command line.
I need to know when the connection goes down. Currently I use a timed script that attempts to reconnect the VPN and if the client returns a 200 I assume it remains connected otherwise the client reconnects, if possible, and the connection is maintained. I log the success or failure of the reconnection event.
This is kind of a kluge. Polling with another process is not a reliable tool in my environment.
Is there a better way I can monitor the connection?
Will the client terminate in some manner I can test in a script or some othere more deterministic means to notify a process that the connection has failed?
Thanks in advance.
Mike

my understanding is: if you param something you are actually
setting a
default value if no value exists........which in your case is
"" or rather
nothing........so if you param with a value of nothing
.......... than go to
check its value.......it will be exactly what you set in the
param.........
"Karen_Little" <[email protected]> wrote in message
news:em53f6$507$[email protected]..
>I need advice on testing for cookies.
>
> I want to test for the presence of a cookie. Rather than
use
> isdefined("cfcookie.mycookie"), I've been setting a
<cfparam
> name="cookie.mycookie" default="" .... for the cookie,
then testing to see
> if
> anything is in it. Since doing that, I seem to whip out
the real cookie.
>
> I just wouldn't think cfparam could do that (but if it
does, it's the most
> effective way to get rid of cookie information in the
world).
>
> Anyway, I am now confused. I want to see if a cookie is
set. Is
> "isDefined"
> the way to go?
>
>

Evaluating dynamically generatedform field names

On form submission I need to find out if check boxes exist
and have values. The field names are generated dynamically &
there could be many. Here's the code I've been messing with. I am
able to find out it the field has a value if it exists, but I can't
figure out how to combine this with isDefined("") to test for the
field's existence and avoid the "field i not defined in form"
errors.
<cfloop index="a" from="1" to="#form.numRows#">
<cfset thisname = "form." & #a# & "_Clear">

<cfset thisVal= Evaluate("form.#thisname#")>
<cfoutput> #thisname# #thisVal# </cfoutput>
</cfloop>
Thanks in advance for any help!

run a loop over your field names like: <cfloop index="x"
list="#form.fieldnames#"> then you have all of your form field
names that are defined.

Using IsDefined()

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