Update multiple records with one submit?

Question

I can't for the life of me figure out how to do this. I have checkboxes with primary key id's listed as the value in a repeat region. I want to perform an update on 2 columns for all id's checked.
SUDEO CODE
<form>
<cfoutput query ....
other textfields...
           <input name="checkbox" type="checkbox" id="checkbox" value="#table.id#" />
</cfoutput>
SUBMIT BUTTON
</form>
My update statement:
UPDATE table
SET column1 = 1, column2 ='whatever'
WHERE id IN (<cfqueryparam cfsqltype="cf_sql_integer" value="#TRIM(FORM.checkbox)#">)
</cfquery>
It only updates if I check one box, does nothing when more than one is selected.
I also tried looping over the update statement but nothing seems to work.

Answer 1

You were missing the list attribute to cfqueryparam (you can also
replace the cfif with a null attribute on the cfqueryparam but it has
the disadvantage of sending the query to the db: null="#Not
Len(Trim(form.checkbox))#").
<cfif Len(Trim(form.checkbox))>
<cfquery ...>
UPDATE table
SET column1 = 1, column2 = 'whatever'
WHERE id IN (<cfqueryparam cfsqltype="cf_sql_integer"
value="#form.checkbox#" list="true">)
</cfquery>
</cfif>
Mack