Qt ISODate formatted date/time including timezone

Question

Does anyone know of a cleaner way to get the time zone included in the ISO string representation of a QDateTime?

I should be able to just use the following:

qDebug() << QDateTime::currentDateTime().toString(Qt::ISODate);

but this always comes out in UTC format:

2014-02-24T01:29:00Z

Currently, the way I'm working round this is to force the TimeSpec to be Qt::offsetFromUtc by explicitly setting the offset, which I'm getting from the QDateTime originally.

QDateTime now = QDateTime::currentDateTime();
int offset = now.offsetFromUtc();
now.setOffsetFromUtc(offset);
qDebug() << now.toString(Qt::ISODate);

This gives what was originally expected:

2014-02-24T01:29:00+02:00

Does anyone know how to do this in a cleaner way or must this be logged as a bug?

EDIT: I'm using Qt5.2.1

UPDATE:

The following small program shows what I mean:

#include <QtCore/QDateTime>
#include <QtCore/QDebug>

int main(int argc, int argv){
    qDebug() << QDateTime::currentDateTime().toString(Qt::ISODate);
    qDebug() << QDateTime::currentDateTime().toTimeSpec(Qt::OffsetFromUTC).toString(Qt::ISODate);

    QDateTime now = QDateTime::currentDateTime();
    int offset = now.offsetFromUtc();
    now.setOffsetFromUtc(offset);
    qDebug() << now.toString(Qt::ISODate);

    return 0;
}

The following output is generated:

"2014-02-24T10:20:49" 
"2014-02-24T08:20:49Z" 
"2014-02-24T10:20:49+02:00"

The last line is the one that is expected. Please note that the second time has been converted to UTC, which is not what is wanted.

Answer 1

This had not been present before 5.2, but it was integrated in there. It seems that you got the syntax incorrect though because it should be like this:

QDateTime::currentDateTime().toTimeSpec(Qt::OffsetFromUTC).toString(Qt::ISODate)

as per the corresponding bugreport. Note that toTimeSpec(Qt::OffsetFromUTC) call in the middle.

Answer 2

When I need that I use the following workaround:

QDateTime::currentDateTime().toOffsetFromUtc(QDateTime::currentDateTime().offsetFromUtc()).toString(Qt::ISODate);

I have not tested if @lpappa is working on new versions. The above workaround has been tested on Qt 5.3