diff --git a/handler.go b/handler.go
index d8baca6..07e065f 100644
--- a/handler.go
+++ b/handler.go
@@ -5,6 +5,8 @@ import (
 	"strconv"
 	"strings"
 
+	"github.com/davecgh/go-spew/spew"
+
 	"gitbase.de/gopackage/mgocrud"
 	"github.com/gin-gonic/gin"
 	mgo "gopkg.in/mgo.v2"
@@ -355,9 +357,13 @@ func (api *API) collectionPutHandler(m mgocrud.ModelInterface) gin.HandlerFunc {
 			field := newMStruct.Field(i)
 			fieldT := newMStruct.Type().Field(i)
 
-			if (field.Kind() == reflect.Ptr || field.Kind() == reflect.Slice) &&
-				!field.IsNil() {
+			if fieldT.Anonymous && fieldT.Name == "Model" { // is embedded mgocrud.Model, so not in changes
+				continue
+			}
 
+			nilAble := (field.Kind() == reflect.Ptr || field.Kind() == reflect.Map || field.Kind() == reflect.Slice)
+
+			if (nilAble && !field.IsNil()) || !nilAble {
 				// apply naming conventions of mgo for changeset
 				tag := fieldT.Tag.Get("bson")
 				if tag == "" && !strings.Contains(string(fieldT.Tag), ":") {
@@ -378,7 +384,7 @@ func (api *API) collectionPutHandler(m mgocrud.ModelInterface) gin.HandlerFunc {
 				orgMStruct.Field(i).Set(field)
 			}
 		}
-		//spew.Dump(changes)
+		spew.Dump(changes)
 		//spew.Dump(orgM)
 
 		if err := validateObject(&Context{
@@ -391,7 +397,7 @@ func (api *API) collectionPutHandler(m mgocrud.ModelInterface) gin.HandlerFunc {
 			})
 			return
 		}
-		//spew.Dump(orgM)
+
 		err = mgocrud.UpdateDocument(db, orgM, changes)
 		if err != nil {
 			c.JSON(500, gin.H{