bug fix

ibzdst-core/src/main/java/cn/ibizlab/core/lite/extensions/domain/ModelObj.java

@@ -370,8 +370,12 @@ public class ModelObj extends DataObj<String,Object> {
         return new FieldObj().setValue(val).setProperty(this.getDataModel().getFactPorperty());
     }
 
-    
-
+    @JsonIgnore
+    @JSONField(serialize = false)
+    public FieldObj $K()
+    {
+        return new FieldObj().setValue(this.getRowKey()).setProperty(this.getDataModel().getFactPorperty());
+    }
 
 
     public boolean IF(String cond)