From a16938f455f5ec8499d5fe1335f2ea66fedc62a4 Mon Sep 17 00:00:00 2001
From: Ankush Menat <ankush@frappe.io>
Date: Tue, 24 Feb 2026 12:31:09 +0530
Subject: [PATCH] fix(DX): Throw error when unsupported input is sent (#37438)

---
 frappe/handler.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/frappe/handler.py b/frappe/handler.py
index 0ff3be8225..a9e3178bb7 100644
--- a/frappe/handler.py
+++ b/frappe/handler.py
@@ -265,6 +265,10 @@ def run_doc_method(method, docs=None, dt=None, dn=None, arg=None, args=None):
 	if dt:  # not called from a doctype (from a page)
 		if not dn:
 			dn = dt  # single
+
+		if not isinstance(dn, str | int):
+			frappe.throw("'dn' must be a string or an integer")
+
 		doc = frappe.get_doc(dt, dn, check_permission=True)
 
 	else: