assignFrom assigns change token from the source

Author: Vlad Balin

dist/index.js

@@ -180,7 +180,16 @@ export abstract class Transactional implements Messenger, IONode, Validatable, T
 
     // Assign transactional object "by value", copying aggregated items.
     assignFrom( source : Transactional | Object ) : this {
-        return this.set( ( <any>source ).__inner_state__ || source, { merge : true } );
+        this.set( ( <any>source ).__inner_state__ || source, { merge : true } );
+
+        // Synchronize change tokens
+        const { _changeToken } = source as any;
+
+        if( _changeToken ){
+            this._changeToken = _changeToken;
+        }
+
+        return this;
     }
 
     // Apply bulk object update without any notifications, and return open transaction.

dist/index.js.map

@@ -1032,7 +1032,12 @@ var Transactional = (function () {
         return this;
     };
     Transactional.prototype.assignFrom = function (source) {
-        return this.set(source.__inner_state__ || source, { merge: true });
+        this.set(source.__inner_state__ || source, { merge: true });
+        var _changeToken = source._changeToken;
+        if (_changeToken) {
+            this._changeToken = _changeToken;
+        }
+        return this;
     };
     Transactional.prototype.parse = function (data, options) { return data; };
     Transactional.prototype.deepGet = function (reference) {