Serializing QHash to a QByteArray

[PeterThePuter]

Hey all,

I am having some trouble serializing a QHash. Following this snippit I attempted this:

#include <QtCore/QCoreApplication>
#include <QHash>
#include <QVariant>
#include <QDebug>
 
int main(int argc, char *argv[])
{
 
    QHash<QString,QVariant> hash;
    hash.insert("Key1",1);
    hash.insert("Key2","thing2");
 
    QByteArray ba;
    QDataStream ds(&ba, QIODevice::WriteOnly);
    ds << hash;
    qDebug() << ds;
 
}

#include <QtCore/QCoreApplication>
#include <QHash>
#include <QVariant>
#include <QDebug>

int main(int argc, char *argv[])
{

    QHash<QString,QVariant> hash;
    hash.insert("Key1",1);
    hash.insert("Key2","thing2");

    QByteArray ba;
    QDataStream ds(&ba, QIODevice::WriteOnly);
    ds << hash;
    qDebug() << ds;

}

To copy to clipboard, switch view to plain text mode 

However, when I run it, qDebug() spits this out:

QIODevice::read: WriteOnly device
QIODevice::read: WriteOnly device
QIODevice::read: WriteOnly device
QVariant(, )

QIODevice::read: WriteOnly device
QIODevice::read: WriteOnly device
QIODevice::read: WriteOnly device
QVariant(, )

To copy to clipboard, switch view to plain text mode 

What am I doing wrong?

Thanks!
-J