Merge pull request #37608 from kaulith/fix-link-filters-enforcement

fix: enforce link_filters on link fields server-side

frappe/client.py

@@ -465,7 +465,7 @@ def validate_link_and_fetch(
 	)
 
 	if not search_result:
-		return {}  # does not exist or filtered out
+		return {}  # Either the record does not exist or was excluded by link_filters
 
 	values = None
 	is_virtual_dt = bool(meta.get("is_virtual"))

frappe/public/js/frappe/form/controls/link.js

@@ -938,6 +938,17 @@ frappe.ui.form.ControlLink = class ControlLink extends frappe.ui.form.ControlDat
 			.then((response) => {
 				if (!response) return;
 
+				const has_filters = !!(args.filters && Object.keys(args.filters).length);
+				if (!response.name && has_filters) {
+					frappe.show_alert({
+						message: __("{0}: {1} did not match any results.", [
+							__(this.df.label || this.df.fieldname),
+							value,
+						]),
+						indicator: "red",
+					});
+				}
+
 				update_dependant_fields(response);
 				return response.name;
 			});