How to add a line in sublist with type list

AI generated answer (using internal Slack threads):

To add a line in a sublist with type list in SuiteScript, you can use the

setSublistValue

method. This method allows you to set the value of a field in a sublist line. However, you need to be aware that the sublist must be loaded into memory before you can manipulate it. Here is a sample code snippet that demonstrates how to use `setSublistValue`:

javascript
var _r = record.load({ 
  type: "customrecord_slip", 
  id: _id
});
var _sub = _r.getSublist({ 
  sublistId: "recmachcustrecord_rec2"
});
var linecount = _r.getLineCount({ 
  sublistId:'recmachcustrecord_rec2' 
});

var slist = _f.addSublist({
  id : 'custpage_sublistid',
  type : ui.SublistType.LIST,
  label : 'Test Sublist'
});

for(var i = 0; i < linecount; i++) {
  var getVal1 = _r.getSublistValue({ sublistId:'recmachcustrecord_rec2',fieldId:'custrecord_tslipc_a',line:i });
  var setval1 = slist.setSublistValue({ id:'sl_' + i + '_a', line: i, value: getVal1});
}

In this example, a sublist is loaded from a record, and then a new sublist is added to a form. The

setSublistValue

method is used in a loop to set the value of a field in each line of the new sublist. Please note that the

setSublistValue

method requires the sublist to be in memory, which means you need to load the record containing the sublist before you can use this method. ****** Disclaimer: This response was generated by an artificial intelligence assistant based on previous conversations from multiple Slack channels, and may contain inaccuracies or mistakes. ******