Prevent primary key from being changed when doing an update on Interface based queries

callback_update.go

@@ -69,9 +69,14 @@ func updateCallback(scope *Scope) {
 			sort.Strings(columns)
 
 			for _, column := range columns {
+				// Get the field data
+				field, _ := scope.FieldByName(column)
+
+				if !field.IsPrimaryKey {
 					value := updateMap[column]
 					sqls = append(sqls, fmt.Sprintf("%v = %v", scope.Quote(column), scope.AddToVars(value)))
 				}
+			}
 		} else {
 			for _, field := range scope.Fields() {
 				if scope.changeableField(field) {