commit 51bbd62cd2226807050bea71bdf08c680de32637
Author: Christian Ehringfeld <c.ehringfeld@t-online.de>
Date:   Mon Aug 10 00:39:33 2015 +0200

    ...

diff --git a/src/validators/validator.cpp b/src/validators/validator.cpp
index d9673a0..2d09746 100644
--- a/src/validators/validator.cpp
+++ b/src/validators/validator.cpp
@@ -16,7 +16,7 @@ const QHash<QString, QString> Validator::builtInValidators() {
 //    hash.insert("exist", "ExistValidator");
 //    hash.insert("image", "ImageValidator");
 //    hash.insert("size", "SizeValidator");
-//    hash.insert("number", "NumberValidator");
+    hash.insert("number", "NumberValidator");
 //    hash.insert("date", "DateValidator");
     hash.insert("required", "RequiredValidator");
 //    hash.insert("unique", "UniqueValidator");