Difficulty in using CartJS in Business Rule

[Terence N]

Hi,

I am trying to submit a catalog item request through a business rule. I came across the CartJS documentation and followed the sample code there. However, when using cart.addToCart() or the other submission calls, I got the following error:

Root cause of JavaScriptException: java.lang.ClassCastException 
: java.lang.ClassCastException: class org.json.simple.JSONObject cannot be cast to class java.lang.String (org.json.simple.JSONObject is in unnamed module of loader com.snc.orbit.container.tomcat8.ParallelOrbitTomcat8ClassLoader @29fe1f17; java.lang.String is in module java.base of loader 'bootstrap'):  com.glideapp.servicecatalog.CatalogUtil.jsonToMap(CatalogUtil.java:619)
 

Below is my code:

const cart = new sn_sc.CartJS(gs.generateGUID());
const request = {
	sysparm_id: routineCreationCatalogItem.sys_id,
	sysparm_quantity: '1',
	variables:{
		routine_name: `Daily Routine - ${businessApp.name}`,
		activity: dailyActivity.sys_id,
		business_application: businessApp.sys_id
	}
};

cart.addToCart(request);​

In the example code provided in the documentation, there was no need to do JSON.stringify() on the request. This is the first issue.

Subsequently I tried using JSON.stringify() on the request and there was no error thrown anymore. However, nothing was returned and I am not able to log out the cart details so I cannot do any troubleshooting.

Is anyone facing the same issues as me? 

[Ankur Bawiskar]

@Terence N 

try this

// 1) Instantiate CartJS (no GUID needed in most recent docs)
var cart = new sn_sc.CartJS();

// 2) Build the item payload as a JS object
var itemOrderDetails = {
    sysparm_id: routineCreationCatalogItem.sys_id,   // catalog item sys_id
    sysparm_quantity: '1',
    variables: {
        routine_name: 'Daily Routine - ' + businessApp.name,
        activity: dailyActivity.sys_id,
        business_application: businessApp.sys_id
    }
};

// 3) Convert to JSON string before passing to addToCart
var itemJson = JSON.stringify(itemOrderDetails);

// 4) Add to cart
var addToCartResult = cart.addToCart(itemJson);

// Optional: log result for troubleshooting
gs.info('addToCart result: ' + JSON.stringify(addToCartResult));

// 5) Checkout
var checkoutResult = cart.checkoutCart();

gs.info('checkoutCart result: ' + JSON.stringify(checkoutResult));

// 6) Use the result
if (checkoutResult && checkoutResult.request_number) {
    gs.info('Order submitted. Request: ' + checkoutResult.request_number);
    // If you need sys_id, you may need to query sc_request by number
} else {
    gs.error('Failed to submit order: ' + JSON.stringify(checkoutResult));
}

💡 If my response helped, please mark it as correct ✅ and close the thread 🔒— this helps future readers find the solution faster! 🙏

[Terence N]

Thanks for the reply, but stringify the item does not work

[musislam]

Hi Terence,

That ClassCastException usually means one of the values in the request isn't a plain string. routineCreationCatalogItem.sys_id, dailyActivity.sys_id and businessApp.sys_id are GlideElement objects, not text, so CartJS ends up with an object where it expects a string.

Try passing everything as strings. I'd also drop the GUID from the constructor. That parameter is the cart name, so you'd get a new cart on every run.

var cart = new sn_sc.CartJS();
var request = {
    sysparm_id: routineCreationCatalogItem.getUniqueValue(),
    sysparm_quantity: '1',
    variables: {
        routine_name: 'Daily Routine - ' + businessApp.getValue('name'),
        activity: dailyActivity.getUniqueValue(),
        business_application: businessApp.getUniqueValue()
    }
};
cart.addToCart(request);
var result = cart.checkoutCart();
gs.info('CartJS result: ' + JSON.stringify(result));

If it still fails, can you confirm:

1. Are routineCreationCatalogItem, dailyActivity and businessApp all GlideRecords?

2. Is the business rule after or async?

3. Do the variable names match the item exactly, including any in a variable set?

If that works for you, mind marking it as the recommended solution? Helps me support these better for the community.

[yashkamde]

Hello @Terence N ,

The issue might be, dailyActivity.sys_id and businessApp.sys_id aren't plain JS strings they're GlideElement objects. CartJS internally passes variables through CatalogUtil.jsonToMap(), which needs a primitive String.

try every variable value to a primitive string :

const cart = new sn_sc.CartJS();

const request = {
    sysparm_id: routineCreationCatalogItem.sys_id.toString(),
    sysparm_quantity: '1',
    variables: {
        routine_name: `Daily Routine - ${businessApp.name.toString()}`,
        activity: dailyActivity.sys_id.toString(),
        business_application: businessApp.sys_id.toString()
    }
};

const cartResponse = cart.addToCart(request);
gs.info('Cart response: ' + JSON.stringify(cartResponse));

If my response helped mark as helpful and accept the solution.