Interact with service portal widget in catalog item

larstange · ‎08-15-2016

Hi all

So we are currently analyzing if we can replace our current service catalog (based on the standard ServiceNow interface and self-service module - no CMS) with the Service Portal.

We have a number of more advanced catalog items, where we use UI macro to display additional information to the user, that we are not able to achieve using the available variable types.

As UI Macros are not available in Service Portal we need a replacement. Here I have discovered a new "widget" field the catalog varaible form, where you can point to a portal widget and get it displayed on the catalog item.

But we need to be able to interact with the widget and affect what it is displaying based on the values selected in the variables on the catalog item.
Basically I want to write to the data in the widget's scope via a catalog client script.

The normal way of accessing an angular scope from the outside is using the syntax

var scope = angular.element($("#[element]")).scope();

So I have created a clone of the Hello World 1 widget and modified it so the input field has an ID

<div>
 Enter your name:
 <input id="helloWorld" type="text" ng-model="c.data.sometext" ng-change="c.display()"/>
 <h1>{{ c.data.message }}</h1>
</div>

Then I try to access the scope from an onChange script in the catalog item

     var scope = angular.element(document.getElementById('helloWorld')).scope();
       scope.$apply(function(){
               scope.data.sometext = newValue;
       });

But i get an error in the console saying (g_env) [SCRIPT:EXEC] Error while running Client Script "onChange_name": TypeError: Cannot read property 'element' of null

So it looks like the catalog client scripts does not have access to the loaded angular in any way. I have tried some different thinks to try and be able to access angular but no avail.

If anybody has an idea I would appreciate any pointers - if we don't solve this, then the portal is not an option.

Regards

Lars

nathanfirth

larstange · ‎08-15-2016

I found the solution my self.

You can read and write to the catalog variables using $scope.page.g_form. and then any of the g_form function like setValue and getValue.

Then I use the angular $watch feature to define a function to watch for changes in the catalog variable and then update my data in the widget scope.

It looks like this

HTML template

   <div>

   Data from catalog variable:

   <h1>{{ c.data.message }}</h1>

   </div>

Client Script Controller

function($scope) {

         var c = this;


         //Watch for changes in the name variable

         $scope.$watch(function () {

                   return $scope.page.g_form.getValue('name');

         }, function (value) {

         //Update local data object with data from variable

         c.data.message = value ? 'Content of name variable: ' + value : '';

});

}

Result - the text in the widget is updated when you change focus away from the catalog variable

View solution in original post

Bhavin Jain1 · ‎03-09-2017

Im using as single line text field,

Ideally should work for all kind of variables, if i want to retrieve the value.

Thanks,

Bhavin

larstange · ‎01-02-2018

Hi

Use g_form.getDisplayValue('variable_name');

saurabhchande · ‎01-08-2018

What if I am using a child widget in variable of catalog item and that child widget is calling a parent widget... and in parent widget I am using "$scope.page.g_form" but it is not working because I think "$scope.page" is used. any way to get this working in parent widget which is being called in child widget?

larstange · ‎01-09-2018

If your parent widget is part of the portal and is not embedded in a macro variable, then I don't think your parent widget will have access to the variable values.

Then you need to send all needed values from the child to the parent.

Fathima6 · ‎07-14-2020

how to call parent widget from child widget to access g_form?