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-rw-r--r--odb/qt/basic/mysql/default-mapping.hxx7
1 files changed, 4 insertions, 3 deletions
diff --git a/odb/qt/basic/mysql/default-mapping.hxx b/odb/qt/basic/mysql/default-mapping.hxx
index e26e73e..ce692bf 100644
--- a/odb/qt/basic/mysql/default-mapping.hxx
+++ b/odb/qt/basic/mysql/default-mapping.hxx
@@ -9,10 +9,11 @@
#include <QtCore/QString>
#include <QtCore/QByteArray>
-// By default, map QString to MySQL TEXT for non-id and to VARCHAR(256) for
-// id members. MySQL cannot have primary keys of the TEXT type.
+// Map QString to MySQL TEXT for non-id and to VARCHAR(256) for id members.
+// MySQL cannot have primary key of the TEXT type. Allow NULL values by
+// default as QString provides a null representation.
//
-#pragma db value(QString) type("TEXT") id_type("VARCHAR(256)")
+#pragma db value(QString) type("TEXT") id_type("VARCHAR(256)") null
// Map QByteArray to MySQL BLOB by default. Allow NULL values by default as
// QByteArray provides a null representation.