GlideAjax returns null

[thomaskennedy]

This is not for the service catalog.

My Script include (it's client callable). I would ordinarily not include my params in the function signature, but I added them here for troubleshooting.

var DecisionUtility = Class.create();
DecisionUtility.prototype = Object.extendsObject(global.AbstractAjaxProcessor, {
    initialize: function() {},
	
	// params: modelName, exactMatch, excludeSysId
	// Returns: [{name:"Dell XYZ"}, ...]
	getModelsByName: function(modelName, exactMatch, excludeSysId) {
		gs.info("getModelsByName 1");
		
		if(this["getParameter"]) {
			var modelName = this.getParameter("sysparm_modelname") || modelName;
			var exactMatch = this.getParameter("sysparm_exactmatch") || exactMatch;
			var excludeSysId = this.getParameter("sysparm_excludesysid") || excludeSysId;
		}
		
		gs.info("getModelsByName 2");
		
		var result = [];
		var gr = new GlideRecord("cmdb_model");
		if(excludeSysId) gr.addQuery("sys_id", "!=", excludeSysId);
		if(exactMatch) {
			gr.addQuery("name", "=", modelName);
		} else {
			gr.addQuery("name", "CONTAINS", modelName);
		}
		
		gs.info("getModelsByName 3");
		
		gr.setLimit(3);
		gr.query();
		while(gr.next()) {
			result.push(
				{
					"name": gr.getValue("name")
				}
			);
		}
		
		gs.info("getModelsByName 4");
		
		return JSON.stringify(result);
	},
	
    type: 'DecisionUtility'
});

My onChange Script:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {
    if (isLoading || newValue === '') {
        return;
    }

    if (newValue != "") {
        // also tried including the scope
        //var ga = new GlideAjax('x_acso_spencer_imp.DecisionUtility');
	var ga = new GlideAjax('DecisionUtility');
        ga.addParam('sysparm_name', "getModelsByName");
        ga.addParam('sysparm_modelname', newValue);
        ga.addParam('sysparm_exactmatch', false);
        ga.addParam('sysparm_excludesysid', g_form.getUniqueValue());
        ga.getXML(cb);
    }

    function cb(response) {
        var answer = response.responseXML.documentElement.getAttribute('answer');
        alert(answer);
    }
}

The result is null.

However, the method produces the expected outcome when run at the command line:

var util = new x_acso_spencer_imp.DecisionUtility();
var result = util.getModelsByName("Dell");
gs.info(JSON.stringify(result))

x_acso_spencer_imp (DecisionUtility): getModelsByName 1
x_acso_spencer_imp (DecisionUtility): getModelsByName 2
x_acso_spencer_imp (DecisionUtility): getModelsByName 3
x_acso_spencer_imp (DecisionUtility): getModelsByName 4
x_acso_spencer_imp: "[{\"name\":\"Dell Command | Integration Suite for System Center 5\"},{\"name\":\"Dell Command | Power Manager v2\"},{\"name\":\"Dell Command | Update 10 v4 for Windows\"}]"

There is no error in the log. The info statements do not appear in the log when I run it through ajax.

The script include did not include Object.extendsObject.. at first; I added that later when I wanted to add ajax calls.

So, what's the problem here?

[Bert_c1]

Hi,

Maybe use 'ga.getXMLAnser(cb);' in your onChange client script.

also, I have a simple example, where my script include has the following:

var HelloWorld = Class.create();
HelloWorld.prototype = Object.extendsObject(AbstractAjaxProcessor, {

	responseStr: function() {
        var userName = this.getParameter("sysparm_user_name");
 
        // Build the payload. You can return additional data if needed. 
        var result = "Hello "+userName;

        return JSON.stringify(result);
    },

    type: 'HelloWorld'
});

My onLoad client script:

function onLoad() {
   //Type appropriate comment here, and begin script below
   var ga = new GlideAjax('HelloWorld'); // GetUserInfo is the script include name 
   ga.addParam('sysparm_name','responseStr'); // is the function in the script include that we're calling 
//   ga.addParam('sysparm_user_name','fred.luddy'); // set user to Fred Luddy 
	ga.addParam('sysparm_user_name',g_user.userName); // set user to Fred Luddy 


   /* Call HelloWorld.responseStr() with user set to Fred Luddy and use the callback function ManagerParse() to return the result when ready */
   ga.getXMLAnswer(ManagerParse);  		
}

// callback function for returning the result from the script include
function ManagerParse(response) {  
   alert(response);
}

Maybe others here have more to offer. You don't say if any alert is seen on the form.

[thomaskennedy]

This is what I get:

In fact the whole param to the callback is null:

function cb(response) {
  alert(response); // null
}

And the log messages do not appear. So it's not invoking anything on the server and I've no idea why not. 

[mush]

Thank you!
I've been trying to figure this out and your post really helped me!