Question

I am using ColdFusion 9 and jQuery. I am using CFAJAXPROXY.

I have am having trouble accessing the data returned to a jQuery object.

This is part of my jQuery code:

var jro = new jsApp();
NewUser = jro.addUser(NewEmail);

The method in the CFC is addUser. I pass in an Email address (NewEmail) and I get the new user’s UserID back.

This query in the CFC works just fine:

<cfquery name="GetUserID">
SELECT      MAX(UserID) as MaxID
FROM        Users
</cfquery>

When I hard code a value like this, I do not have a problem:

<cfset NewUser = 10>
<cfreturn NewUser>

When I try to use a dynamic variable like this, I get a JSON error:

<cfset NewUser = GetUserID.MaxID>
<cfreturn NewUser>

This error seems to occur in the CFC. Hard coding the return variable works, but returning a single integer from a query does NOT work.

How do I return a single integer from a query? Why is this creating a problem?

Here is the how the CFC is called.

$("#AddUserSave").click(function() {
  NewEmail = $("#NewEmail").attr("value");
  var jro = new jsApp();
  UserID = jro.addUser(NewEmail);
  $("#UserDiv").load("GlobalAdmin/EditUser.cfm?UserID="+UserID);
});

Again, the CFC refuses to return the UserID from the database, but gladly returns a hardcoded number.

Okay, in my CFC this works:

<cfset NewUser = GetUserID.UserID>
<cfset NewUser = 1>
<cfreturn NewUser>

But this does NOT work:

<cfset NewUser = GetUserID.UserID>
<cfreturn NewUser>

Firebug says:

parseJSON throw new SyntaxError("parseJSON"); 
cfajax.js (line 803)

Okay, when I access this method via the browser, it shows an integer being returned.

 <!--- GET MAX USER --->
 <cffunction name="getMaxUser" access="remote" returnformat="plain" returntype="any">
    <cfquery name="GetUserID">
        SELECT  MAX(UserID) AS MaxID
        FROM    Users
    </cfquery>
    <cfreturn createObject( 'java', 'java.lang.Integer' ).init( javaCast( 'int', GetUserID.MaxID ) ) />
</cffunction>

When I view the page source, the maxid is 1 (one / an integer).

The CFC is being called with in JavaScript:

    var jro = new jsApp();
    jro.getMaxUser();

The exact error I am getting can be viewed on this screen shot:

http://evikjames.com/IMAGEs/parsejson.png

And here’s an image of my CFCs.

http://evikjames.com/images/CFC.png

Here’s an image of the URL created by JavaScript to access the method:

http://www.evikjames.com/images/error-2.png

+++++++++++++++++++++++++++++++++++++++++++++++++++++
ANSWER

The JavaScript needs to create a request that sets the return format to plain. I guess its default return type is JSON. The CFC chokes on the JSON that it own self has created.

var jro = new jsApp();
jro.setReturnFormat('plain');
UserID = jro.getMaxUser();

Hats off to Charlie for seeing this through. I am forever grateful.

Answer 1

As per our chat, you need your remotely accessible method to return an integer, not a float.

With credit to http://www.threesources.com/archives/009007.html, you need to do the following:

1) specify returnFormat = “plain” (which I believe you’ve done)

2) <cfreturn createObject( 'java', 'java.lang.Integer' ).init( javaCast( 'int', GetUserID.MaxID ) ) />

As per the site linked to above, the reason is, “ColdFusion’s Numeric type maps to a double in the automatically generated RPC WSDL”.

That site lists 5 steps that need to be taken, but I was able to successfully return an integer by just doing the 2 steps listed above.