Created at and updated at should be read only for the schema

portal/rest/schemas.py

@@ -82,8 +82,8 @@ NESTED = NestedCollection(__name__)
 # pylint: disable=too-few-public-methods
 class BaseSchema(object):
     id = fields.Str(dump_only=True, required=True)
-    created_at = fields.LocalDateTime()
-    updated_at = fields.LocalDateTime()
+    created_at = fields.LocalDateTime(dump_only=True, allow_none=True)
+    updated_at = fields.LocalDateTime(dump_only=True, allow_none=True)
 
 
 class NamedSchema(object):