Should this sample code be returning an error? The reason I ask is it runs
just fine for me both on 6.1 and 7. To answer the question in the subject
yes URL is a structure and typically the cause of an error like you are
describing is something like <cfoutput>#URL#</cfoutput> since that was
allowed in 4.5 but in 6.1 and up you would need to prefix it with the scope
it is in so something like:
<cfset URL = "blah" />
<cfoutput>#Variables.URL#</cfoutput>
On 6/27/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]>
wrote:
>
> Hope the answer isn't already here, but I have looked at all the
> "attempted to dereference a scalar variable" messages and haven't found a
> solution.
>
> Moved from CF 4.5 to CF MX7. All of our code is written using the same
> methodology, using <cfif isdefined("url.testvalue")> to use values passed
> in the URL. This code doesn't work on CF MX7 now. Quick sample code:
>
> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
> "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd";>
> <html xmlns="http://www.w3.org/1999/xhtml"; xml:lang="en" lang="en">
> <head>
> </head>
> <body>
>
> <a href="?testvalue=27">testvalue</a><br />
>
> <cfquery datasource="General_Info" name="ModUsers">
> Select top 5 * from GeneralPosting
> where ag_num = '303'
> </cfquery>
>
> <cfoutput>
> <cfif isdefined("url.testvalue")>
> isdefined("url.testvalue")=#url.testvalue#<br />
> <cfelse>
> isdefined returned false for (url.testvalue)<br />
> </cfif>
>
> <cfif StructKeyExists(url,"testvalue")>
> StructKeyExists(url,"testvalue")=#url.testvalue#<br />
> <cfelse>
> StructKeyExists(url,"testvalue") is false<br />
> </cfif>
> </cfoutput>
>
> Begin cfoutput loop (cfoutput query="modusers"):<br />
> <cfoutput query="modusers">
>
> <cfif isdefined("url.testvalue")>
> testvalue=#url.testvalue#<br />
> <cfelse>
> isdefined returned false for (url.testvalue)<br />
> </cfif>
> </cfoutput>
>
> outside the loop:<br />
>
> <cfoutput>
> <cfif StructKeyExists(url,"testvalue")>
> StructKeyExists(url,"testvalue")=#url.testvalue#<br />
> <cfelse>
> StructKeyExists(url,"testvalue") is false<br />
> </cfif>
> </cfoutput>
>
> Begin cfoutput loop (cfoutput query="modusers"):<br />
> <cfoutput query="modusers">
>
> <cfif isdefined("url.testvalue")>
> testvalue=#url.testvalue#<br />
> <cfelse>
> isdefined returned false for (url.testvalue)<br />
> </cfif>
> <cfif StructKeyExists(url,"testvalue")>
> StructKeyExists(url,"testvalue")=#url.testvalue#<br />
> <cfelse>
> StructKeyExists(url,"testvalue") is false<br />
> </cfif>
> </cfoutput>
>
> outside the loop:<br />
>
> <cfoutput>
> <cfif StructKeyExists(url,"testvalue")>
> StructKeyExists(url,"testvalue")=#url.testvalue#<br />
> <cfelse>
> StructKeyExists(url,"testvalue") is false<br />
> </cfif>
> </cfoutput>
>
> </body>
> </html>
>
> Output with ?testvalue=27 :
>
> testvalue
> isdefined("url.testvalue")=27
> StructKeyExists(url,"testvalue")=27
> Begin cfoutput loop (cfoutput query="modusers"):
> isdefined returned false for (url.testvalue)
> isdefined returned false for (url.testvalue)
> isdefined returned false for (url.testvalue)
> isdefined returned false for (url.testvalue)
> isdefined returned false for (url.testvalue)
> outside the loop:
> StructKeyExists(url,"testvalue")=27
> Begin cfoutput loop (cfoutput query="modusers"):
> isdefined returned false for (url.testvalue)
>
> You have attempted to dereference a scalar variable of type class
> java.lang.String as a structure with members.
>
> Error occurred in line 57:
> 55 : isdefined returned false for (url.testvalue)<br />
> 56 : </cfif>
> 57 : <cfif StructKeyExists(url,"testvalue")>
> 58 : StructKeyExists(url,"testvalue")=#url.testvalue#<br />
> 59 : <cfelse>
>
>
> The docs for isdefined say:
>
> When working with scopes that ColdFusion exposes as structures, the
> StructKeyExists function can sometimes replace this function. The
> following lines are equivalent:
>
> if(isDefined("form.myVariable"))
> if(structKeyExists(form,"myVariable"))
>
> so I added the structKeyExists test in addition to the isdefined, and get
> the dreaded "You have attempted to dereference a scalar variable of type
> class java.lang.String as a structure with members." error.
>
> At the top of the script, URL is obviously a structure, but within the
> <cfoutput query="modusers"> loop something happens to turn it into a
> string.
>
> What the heck is going on here? We really need a solution for this, as we
> need to deploy a new server with CF MX7 on it and this appMUST work.
>
>
> Bill Woodland, Programmer V
> Texas Building and Procurement Commission
> Phone: 512-936-2901 Fax: 512-236-6166 Email:
> [EMAIL PROTECTED]
>
>
>
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