Coldfusion: Simple cfgridupdate validation - coldfusion

Question

I trying to use a very simple CFGRID (with CFGRIDUPDATE) but not allow NULLS.
<cfset strWarning= "">
<cfif IsDefined("FORM.gridEntered")>
<cfif FORM.myName EQ '' OR FORM.myURL EQ ''>
<cfset strWarning= "Error: Form fields cannot be blank">
<cfelse>
<cfgridupdate grid="gridSomething"
dataSource="qryTSQL" tableName="tblName" keyOnly="Yes">
</cfif>
</cfif>
<cfoutput>#strWarning#</cfoutput><br />
<cfform>
<cfgrid name="gridSomething" query="qryTSQL"
selectMode="Edit" format="HTML">
<cfgridcolumn name = "myID" display="No">
<cfgridcolumn name = "myName">
<cfgridcolumn name = "myURL">
</cfgrid>
<cfinput type="submit" name="gridEntered">
The error I am getting is - Error Diagnostics: Complex object types cannot be converted to simple values. The expression has requested a variable or an intermediate expression result as a simple value. However, the result cannot be converted to a simple value. Simple values are strings, numbers, boolean values, and date/time values. Queries, arrays, and COM objects are examples of complex values.
The most likely cause of the error is that you tried to use a complex value as a simple one. For example, you tried to use a query variable in a cfif tag.
I think I am under thinking this desired solution.
Thanks.
EDIT: Updated Error Message
Error Diagnostics: Element MYURL is undefined in FROM.
Form scope - struct
FIELDNAMES GRIDENTERED,__CFGRID__CFFORM_1__GRIDSOMETHING
GRIDENTERED Submit Query
GRIDSOMETHING.MYID Form scope - array
1 1001
GRIDSOMETHING.MYURL Form scope - array
1 /test_d.cfm
GRIDSOMETHING.ORIGINAL.MYID Form scope - array
1 1001
GRIDSOMETHING.ORIGINAL.MYURL Form scope - array
1 /changed.cfm
GRIDSOMETHING.ROWSTATUS.ACTION Form scope - array
1 U
__CFGRID__CFFORM_1__GRIDSOMETHING __CFGRID__EDIT__=2 MYID Y MYURL Y 1 U 1001 1001 /test_d.cfm /changed.cfm

Answer 1

Grids work differently than standard FORM fields. Since grids contain multiples rows of data, CF creates arrays of the new/changed values. One for each grid column ie
FORM.gridname.columnName
To determine if any of the values for a specific column are empty, you need to loop through the array for that column and check each value:
<cfset updateCount = arrayLen(FORM.gridSomething.myName) />
<cfloop from="1" to="#updateCount#" index="x">
<cfset nameValue = trim( FORM.gridSomething.myName[x] ) />
<cfset urlValue = trim( FORM.gridSomething.myURL[x]) ) />
<!--- one or both of the values is empty --->
<cfif not len( nameValue ) OR not len( urlValue )>
... empty value found. do something here ....
</cfif>
</cfloop>

Answer 2

Add this function to you code and call it passing it the FORM scope as follows;
On page or CFC works the same!
Clears up errors with some versions of CF that choke on blank cols in a simple grid update
<cffunction name="cleanGridUpdate" >
<cfargument name="FORM" >
<cfloop collection="#FORM#" item="thisOne">
<cftry>
<cfset thisDeep = arrayLen(FORM[thisOne])>
<cfloop index="x" from="1" to="#thisDeep#">
<cfif len(FORM[thisOne][x])lt 1>
<cfset FORM[thisOne][x] = javaCast( "null", 0 )>
</cfif>
</cfloop>
<cfcatch>
<cfset cat=1>
</cfcatch>
</cftry>
</cfloop>
<cfreturn form>
</cffunction>
<cfif isDefined('URL.action') AND URL.action eq 'gridUpdate'>
<cfset cleanGridUpdate(FORM)>
<cfgridupdate grid="#URL.table#" table="#URL.table#" datasource="your_DS"
keyonly="yes" >
</cfif>
<cfform action="##?action=gridUpdate&table=cheesePuffs" method="post">
<cfgrid name='cheesePuffs' format='HTML'/>
<cfinput name="submit" type="submit" value>
</cfform>