Hi @amal_31845,
Please check the documentation of the Overriding Link Query By Custom Script.
Lots of examples are already available in the forum so please search like frm.set_query
frappe.ui.form.on('DocType', {
refresh: function(frm) {
frm.set_query("item_code", function() {
return {
"filters": {
"item_group": frm.doc.item_group
}
};
});
},
});
Please set the doctype name and field name.