Client script to check if more than one fields change on a form

antonymirza · ‎01-23-2014

We can use onChange client script to check if any one of available fields on the form changes. I need to write an client script for two form fields, I mean script should run if any one of them changes.How can we achieve it?

andrew_venables · ‎01-26-2014

As abhishekte suggests, you will need two client scripts on kb_knowledge, but you can use a third to put your key code in one place:

Name: FieldA Change

Active: Checked

Global: Checked

Type: onChange

Table: Knowledge [kb_knowledge]

Field name: FieldA

Script:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {


   if (isLoading || newValue == '') {


           return;


   }


   kbMyFunction();


}

Name: FieldB Change

Active: Checked

Global: Checked

Type: onChange

Table: Knowledge [kb_knowledge]

Field name: FieldB

Script:

function onChange(control, oldValue, newValue, isLoading, isTemplate) {


   if (isLoading || newValue == '') {


           return;


   }


   kbMyFunction();


}

Then you need to define the shared function that both scripts will call, so create a third new Client Script:

Name: kbMyFunction

Active: Checked

Global: Checked

Type: onLoad

Table: Knowledge [kb_knowledge]

Script:

function onLoad() {


       // do nothing


}


function kbMyFunction() {


     


       var fielda = g_form.getvalue('u_fielda');


       var fieldb = g_form.getvalue('u_fieldb');


     


       if (fielda != '' && fieldb != '') {


               alert('Sending GlideAjax');


               var ga = new GlideAjax('HelloWorld');


               ga.addParam('sysparm_name','helloWorld');


               ga.addParam('sysparm_u_fielda',fielda);


               ga.addParam('sysparm_u_fieldb',fieldb);


               ga.getXML(HelloWorldParse);


       }


}


function HelloWorldParse(response) {


       var answer = response.responseXML.documentElement.getAttribute("answer");


       alert(answer);


}

See GlideAjax - ServiceNow Wiki for how to use GlideAjax.

View solution in original post

antonymirza · ‎01-23-2014

Experts please share your input...

abhishekte · ‎01-24-2014

Hi,

Unfortunately,you have to write two client each on every field to run the same.There is no such way, as per my thinking.

andrew_venables · ‎01-25-2014

g_form has a couple of undocumented things that should allow you to do this:

g_form.modified : Boolean True/False
g_form.modifiedFields : Object
g_form.modifiedFields could contain something like:
incident.caller_id: true
You can access g_form from anywhere on the Client-side.
Bear in mind this undocumented functionality so it might change in a future release

antonymirza · ‎01-25-2014

Dear Andrew,

Thank you for your input but I am not getting how and where to start my script. I have to write a script on KB form (kb_knowledge) and should execute when either field A or field B on the form changes.

If I go with onChange client script then I am not able to satisfy above said condition of either field A or field B on the form changes. Since, both of these fields will be used in my GlideAjax call therefore, I do not opt writing two onChange client scripts.

Can you please suggest?

Brgds, AM