How to fectch data from the link doc

[BT_Eng]

Please do help me.I would grateful.
I have created two doctype(childdoc and parentdoc)

I have link childdoc field docname with parent docname

so that as i choose parentdoc i wanna set firstnam and lastname of parent in child field.I have also attached doc field detail

following are code which i wrote child.js file.Please do correct me if i am doing wrong.Your help will be highly apcreciated

frappe.ui.form.on("child", {
  docname(frm) {
    frappe.msgprint("bwwhutan");
    frappe.call({
      method: "frappe.client.get",
      args: {
        doctype: "parentdoc",
        name: frm.doc.docname,
      },
      callback: (r) => {
        if (r.message) {
          frappe.set_value("fname", r.message.fname);
          frappe.set_value("lname", r.message.lname);
        }
      },
    });
  },
});

[nomi-gee]

Please click on the link use fetch from field in doctype or customie form
Fetch Data from Doctype

[iRaySpace]

Hello,

Please check your trigger name in your script. It should matched with the Name not with the Label set on your DocType fields.

Regards,

Ivan