form params don't work for formfield generated by output query

if i leave the form.OrderID blank even though i'm using <cfparam name="form.OrderID" default=""> (i've also used default="1")

i get the error:

An error occurred while evaluating the expression:


#ListGetAt(OrderID,Counter)#

In function ListGetAt(list, index [, delimiters]) the value of index, which is 1, is not a valid index for the list given as a the first argument (this list has 0 elements). Valid indexes are in the range 1 through the number of elements in the list

my code:

<CFLOOP INDEX=Counter FROM=1 TO=#ListLen(ExAutoArtID)#>
   <CFQUERY NAME="UpdateExBuilder" DATASOURCE="Ikonltd">
       UPDATE ExBuilder
       SET OrderID=#ListGetAt(OrderID,Counter)#,
ExID=#ListGetAt(ExID,Counter)#,
AutoArtID=#ListGetAt(AutoArtID,Counter)#
       WHERE ExAutoArtID=#ListGetAt(ExAutoArtID,Counter)#
   </CFQUERY></CFLOOP>

<cfquery name="Artwork" datasource="Ikonltd">
  SELECT Title, OrderID, ExBuilder.AutoArtID,ExBuilder.ExID,ExBuilder.ExAutoArtID FROM Artwork,ExBuilder WHERE ExBuilder.ExID = #FORM.ExID#
  and Artwork.AutoArtID=ExBuilder.AutoArtID
  </cfquery>

.....................................................

 <cfoutput query="Artwork">
      <tr>
        <td valign="middle">
          <p align="right">
            <input name="OrderID" type="text" id="OrderID" size="5" value="#OrderID#"></cfoutput>
phillystyle123Asked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

x
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

danrosenthalCommented:
What should the orderID be if the variable is blank?

See if this helps:
<CFIF LISTLEN(orderID) gte counter>#ListGetAt(OrderID,Counter)#<CFELSE>NULL</CFIF>
0
Tacobell777Commented:
basically it is saying the value of variable "Counter" is not a valid index, i.e. its probably not an integer.

#ListGetAt("item1, item2, item3", 2)# this is what the function would look like if parsed, maybe that clears things up?
0
anandkpCommented:
If u use
<cfparam name="OrderID" default="">
& in ur code below
#ListGetAt(OrderID,Counter)#

u r bound to get an error ! as u cannot use listgetat on a empty list !

u will need to chk if its blank or not or set it to some value.

i also see that u r running a loop & using counter to get the respective element from teh list
i hope ur list has all the elements ...

if not - u wld be better of checking - the length of the OrderID to be equal to ExAutoArtID [based on ur code]

I guess the logic has gone wrong here ... or may be u cld tell us what exactly is going on - so as to get a clear idea on what cld be done !

K'Rgds
Anand
0
hartCommented:
<CFLOOP INDEX=Counter FROM=1 TO=#ListLen(ExAutoArtID)#>
  <CFQUERY NAME="UpdateExBuilder" DATASOURCE="Ikonltd">
      UPDATE ExBuilder
      SET ExID=#ListGetAt(ExID,Counter)#,
      <cfif ListLen(OrderID) Gte Counter>
      OrderID=#ListGetAt(OrderID,Counter)#,
      </cfif>
      AutoArtID=#ListGetAt(AutoArtID,Counter)#
      WHERE ExAutoArtID=#ListGetAt(ExAutoArtID,Counter)#
  </CFQUERY>
</CFLOOP>

Regards
Hart
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Web Servers

From novice to tech pro — start learning today.