feat: validate linked sales order on material request creation

erpnext/controllers/selling_controller.py

@@ -261,7 +261,7 @@ class SellingController(StockController):
 		for d in self.get("items"):
 			if d.get(ref_fieldname):
 				status = frappe.db.get_value("Sales Order", d.get(ref_fieldname), "status")
-				if status == "Closed" or status == "On Hold":
+				if status in ("Closed", "On Hold"):
 					frappe.throw(_("Sales Order {0} is {1}").format(d.get(ref_fieldname), status))
 
 	def update_reserved_qty(self):

erpnext/stock/doctype/material_request/material_request.js

@@ -128,7 +128,7 @@ frappe.ui.form.on('Material Request', {
 			},
 			get_query_filters: {
 				docstatus: 1,
-				status: ["!=", "Closed"],
+				status: ["not in", ["Closed", "On Hold"]],
 				per_delivered: ["<", 99.99],
 			}
 		});