Custom field price list on the stock entry details table

frappe.ui.form.on("Stock Entry Detail", {
	item_code: function(frm, cdt, cdn) {
  child 
  me.frm.call({
  	method: "frappe.client.get_value",
  	args: {
    doctype: "Item Price",
    fieldname: "price_list_rate",
    filters: { item_code: child.item_code, price_list : child.price_list},
  	},
  	callback: function(r, rt) {
    if(r.message) {
    	frappe.model.set_value(cdt, cdn, 'fieldname', r.message.price_list_rate)
    }
  	}
  });
	}
})