Started MessageAction trait.

src/document/definition.rs

@@ -1,6 +1,7 @@
 use crate::{
     action::{Action, CalcValue, Field, FieldType, MsgAction},
     document::create::IndexType,
+    message::MessageAction,
     mtterror::MTTError,
     name::{Name, NameType, Names},
     queue::data_director::{Include, Path},
@@ -373,11 +374,24 @@ impl DocDef {
     }
 }
 
+impl MessageAction for DocDef {
+    fn doc_name(&self) -> NameType {
+        NameType::None
+    }
+}
+
 #[cfg(test)]
 mod docdefs {
     use super::*;
     use crate::{action::Query, message::wrapper::Update};
 
+    #[test]
+    fn message_doc_name_returns_none() {
+        let docname = Name::english("tester");
+        let mut docdef = DocDef::new(docname);
+        assert_eq!(docdef.doc_name(), NameType::None);
+    }
+
     #[test]
     fn can_field_be_added() {
         let docname = Name::english("tester");