How to set reference variables in Catalog API posts

[mtuman]

I'm currently working with the ServiceNow Catalog Rest API in Java. I have successfully added items to my cart and submitted my cart, however whenever a variable in the body of my post is of type reference I am unable to set it's value. The ticket that gets created is just empty in these fields. Below is a small example of my code.

   HttpPost post = new HttpPost();


   post.setURI(new URI("https://myinstance/api/sn_sc/servicecatalog/items/" + itemId + 
   "/add_to_cart"));

   String encoding =
   Base64.getEncoder().encodeToString(("User:Password").getBytes("UTF-
   8"));

   String authHeader = "Basic " + encoding;

   post.setHeader(HttpHeaders.AUTHORIZATION, authHeader);

   post.setHeader("Content-Type", "application/json");

   /*WorkgroupAssignment is of type reference and never gets set.While 
     short_description' always gets set.*/

   String data = "{'sysparm_quantity': 1,'variables': {'short_description': 
  'Example description','WorkgroupAssignment':'TSU-Middleware'};

   StringEntity entity = new StringEntity(data);

   /**
     * *******************
     * and now the body.. 
     * *******************
   */

   post.setEntity(entity);

WorkgroupAssignment is of type reference. Is there something special I have to do to set variables of type reference?

Thanks

[Brad Tilton]

The value in a reference field/variable is actually the sys_id of the record being referenced, so I would try passing that instead of the display name of the group. Here is a doc on sys_ids: https://docs.servicenow.com/bundle/london-platform-administration/page/administer/table-administrati...

[mtuman]

Thanks...So in this case it would be the sys_id of the Workgroup (TSU-Middleware)...correct?

[Brad Tilton]

If the variable is referencing the group [sys_user_group] table then it would be sys_id of the TSU-Middleware group on that table.

[mtuman]

Ok thanks...now I just have to figure out how I can get access to the sys_ids in that table.