udpate

src/main/java/com/virjar/ratel/api/inspect/ForceFiledViewer.java

@@ -209,7 +209,7 @@ public class ForceFiledViewer {
             } else if (withObjType) {
                 Map<String, Object> container = new HashMap<>();
                 container.put("type", field.getValue().getType());
-                container.put("value", null);
+                container.put("value", field.getValue().toString());
                 container.put("hash", o.hashCode());
                 ret.put(field.getKey(), container);
             }