Catalog Item PDF only Attachment Mandatory

[jeremyhold]

Hello SNC -I am designing a catalog item where when a specific dropdown choice is chosen - lets call it choice_1, then I want to make it mandatory to attach a PDF, and only a PDF. I am new to catalog items in general, and tying this to a UI policy/action as well.

Here is a catalog client script Im working with - but it is far from what I need in this use case. Any help would be appreciated:

function onSubmit() {

  if (g_form.getValue('check_attachment') == 'Yes') {

  var ord_id = gel('sysparm_cart_edit').value;

  var gr = new GlideRecord("sys_attachment");

  gr.addQuery("table_name", "sc_cart_item");

  gr.addQuery("table_sys_id", ord_id);

  gr.query();

  if (!gr.next()) {

  alert("You must attach a file to submit.");

  return false;

  }

  }

  else if (g_form.getValue('check_attachment') == 'No') {

  var cat_id = gel('sysparm_item_guid').value;

  var gf = new GlideRecord("sys_attachment");

  gf.addQuery("table_name", "sc_cart_item");

  gf.addQuery("table_sys_id", cat_id);

  gf.query();

  if (!gf.next()) {

  alert("You must attach the required form to submit.");

  return false;

  }

  }

}

[jeremyhold]

If anyone else has feedback or has links to relevant examples that would be appreciated as well.

Thank you in advance,

Jeremy

[zubair3]

Try This one 

var attach = new GlideRecord('sys_attachment');
attach.addQuery('table_name',current.getTableName());
attach.addQuery('table_sys_id',current.sys_id);
attach.query();
if(attach.getRowCount() < 2)
{
//gs.addInfoMessage('Submitted');
current.setAbortAction(true);
}
else
{
//gs.addErrorMessage("add at least 2 attachment, Order Empty');
current.setAbortAction(false);
}