[fix] modified in sales order and purchase order

erpnext/patches/v6_4/fix_modified_in_sales_order_and_purchase_order.py

@@ -0,0 +1,10 @@
+from __future__ import unicode_literals
+import frappe
+
+def execute():
+	for doctype in ("Sales Order", "Purchase Order"):
+		data = frappe.db.sql("""select parent, modified_by, modified
+			from `tab{doctype} Item` where docstatus=1 group by parent""".format(doctype=doctype), as_dict=True)
+		for item in data:
+			frappe.db.sql("""update `tab{doctype}` set modified_by=%(modified_by)s, modified=%(modified)s
+				where name=%(parent)s""".format(doctype=doctype), item)