diff --git a/model/metadata.h b/model/metadata.h
index 3597df8..ea494f4 100644
--- a/model/metadata.h
+++ b/model/metadata.h
@@ -40,6 +40,7 @@ static QHash<int, QByteArray> ROLE_NAMES = {
 static QList<UserRoles> STRING_ROLES = {NameRole, DescriptionRole, InfoRole, IdRole};
 static QList<UserRoles> INT_ROLES    = {AmountRole};
 static QList<UserRoles> DOUBLE_ROLES = {FactorRole};
+static QList<UserRoles> NUMBER_ROLES = INT_ROLES + DOUBLE_ROLES;
 
 static const QList<UserRoles> TYPE_ROLES = {TypeRole};
 static const QList<QString> TYPES        = {"A", "B", "C", ""};