CartJS API to add multiple item to cart and submit order

[Arun Chauhan]

I have a requirement where I need to create a single Service Request ticket with multiple RITMs. I am trying to use the CartJS API i.e. sn_sc.CartJS. I have defined an API endpoint like below:

https://devxxxx.service-now.com/api/x_123589_myscope/my_catalog_api/create_ticket

and I am sending below body in the REST request:

{
     "items":[
           {
                 "sys_id":"b5c3d4280fd112406f23ba8ce1050e1a",
                 "variables":{
                       "requested_for":"ece090564fb30300439c30318110c7e0"
                   }
           }, 
           {
           "sys_id": "9af59b9a4fc01300439c30318110c791"
           }
     ]
}

Below is my code in the Scripted REST resource:

(function process(/*RESTAPIRequest*/ request, /*RESTAPIResponse*/ response) {
var request_body = request.body.nextEntry();
var requestedItems = request_body.items || [];
var cartId = gs.generateGUID();
gs.info("Requested Items Length : " + requestedItems.length + " GUID : "+ cartId);
var cart = new sn_sc.CartJS("cart_" + cartId);
for(i=0; i<requestedItems.length; i++) {
       var itemDetails = requestedItems[i];
       var itemId = itemDetails.sys_id;
       if(!itemId)
             throw new sn_ws_err.BadRequestError('Item id is required');
       itemDetails.sysparm_id = itemDetails.sys_id;
       itemDetails.sysparm_quantity = '' + (itemDetails.sysparm_quantity || '1');
       if (!itemDetails.variables) {
               itemDetails.variables = {};
       }
       gs.info("Item Details : " + itemDetails);
       cart.addToCart(itemDetails);
}
var cartItems = cart.getCartItems(); 
       gs.info("CartItems : "+ cartItems);
var checkoutInfo = cart.checkoutCart();
cart.empty();
       gs.info(checkoutInfo);
})(request, response);

I am passing array of Catalog items with sys_id in the request. I am parsing the request in the script and creating a unique cart using random GUID. Then I am using addToCart method to add each item to cart and finally using cart.checkoutCart to create the REQ and RITMs.

But this results in creation of an empty REQ with no RITM. Also in logs I can see below warning:

java.lang.NullPointerException
Caused by error in sys_ws_operation.e2648fde4f801300439c30318110c7c8.operation_script at line 1
com.glideapp.servicecatalog.CartRecord.checkout(CartRecord.java:1162)
com.glideapp.servicecatalog.CartRecord.checkoutCart(CartRecord.java:1148)
com.glideapp.servicecatalog.scoped.api.CartJS.jsFunction_checkoutCart(CartJS.java:578)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)

and below error:

java.lang.NullPointerException: com.glide.rest.domain.ServiceException: java.lang.NullPointerException: com.glide.rest.service.custom.CustomServiceExceptionResolver.throwServiceException(CustomServiceExceptionResolver.java:91)
com.glide.rest.service.custom.CustomServiceExceptionResolver.throwServiceException(CustomServiceExceptionResolver.java:81)
com.glide.rest.service.custom.CustomServiceExceptionResolver.resolveForException(CustomServiceExceptionResolver.java:39)
com.glide.rest.service.custom.CustomServiceResultHandler.handle(CustomServiceResultHandler.java:23)
com.glide.rest.service.custom.CustomService.execute(CustomService.java:83)
com.glide.rest.handler.impl.ServiceHandlerImpl.invokeService(ServiceHandlerImpl.java:36)
com.glide.rest.processors.RESTAPIProcessor.process(RESTAPIProcessor.java:271)
com.glide.processors.AProcessor.runProcessor(AProcessor.java:483)
com.glide.processors.AProcessor.processTransaction(AProcessor.java:205)
com.glide.processors.ProcessorRegistry.process0(ProcessorRegistry.java:178)
com.glide.processors.ProcessorRegistry.process(ProcessorRegistry.java:167)
com.glide.ui.GlideServletTransaction.process(GlideServletTransaction.java:31)
com.glide.sys.Transaction.run(Transaction.java:2038)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
java.lang.Thread.run(Thread.java:748)

Any help?

[larstange]

Ok - that why. You can't just apply a random GUID in the cartID. The cartID MUST contain a sys_id of an existing record (for the current logged in user) in the sc_cart table. So it would be best just to leave it blank.

CartJS(String cartName)

Creates an instance of the CartJS class with the name of a defined cart for the user who is currently logged in.

Parameter(s):

Name	Type	Description
cartName	String	Name of a defined cart for the user who is currently logged in.

Example

var cart = new sn_sc.CartJS(cart1);

[Arun Chauhan]

Oh now i understand. Thanks for the information. I was trying to mimic the Buy item API which has below code:

var itemId = '' + request.pathParams.sys_id;
var cart = new sn_sc.CartJS("cart_" +itemId);

If you see they are passing a string value in the cart argument to create a unique cart. Do you have any idea about this ?

Note: itemId is the sys_id of the Catalog Item.

Even Checkout Order guide has below code:

cart = new sn_sc.CartJS(guideJS.getID());

Here guideJS object is the Order guide object.

[ashabagade]

Hi larstange,

Any idea how would the item JSON look like for variableSet?

Thanks in Advance