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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