Registring QList<CustomType> - qt

Question

I got a runtime crash when registering a QList (CustomType is a Q_GADGET generate by the repc (Qt remote object compiler)).
Actually I am trying to expose a list of custom type using Qt Remote Object.
file.rep :
POD Service(QString name, QUrl enpoint)
POD Services(QList<Service> svcs)
class ROObject
{
PROP(bool state = false);
PROP(Services services);
}
main.cpp:
#include <QCoreApplication>
#include <QTimer>
#include <QRemoteObjectHost>
#include "rotest.h"
int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);
qRegisterMetaType<QList<Service>>();
ROTest t;
QList<Service> l;
l.push_back(Service("houssem", QUrl("local:houssem")));
l.push_back(Service("houss", QUrl("local:houss")));
Services ss(l);
t.setServices(ss);
QRemoteObjectHost host;
host.setHostUrl(QUrl("local:s"));
host.enableRemoting(&t);
qDebug() << "Services : " << t.services().svcs().count();
return a.exec();
}
error:
Thank you for your help.

Answer 1

Qt doesn't know how to serialize your custom types.
In addition to registering it as a meta type, you need to implement and register stream operators for it:
void qRegisterMetaTypeStreamOperators(const char *typeName)
Registers the stream operators for the type T called typeName.
Afterward, the type can be streamed using QMetaType::load() and
QMetaType::save(). These functions are used when streaming a QVariant.
qRegisterMetaTypeStreamOperators<MyClass>("MyClass");
// The stream operators should have the following signatures:
QDataStream &operator<<(QDataStream &out, const MyClass &myObj);
QDataStream &operator>>(QDataStream &in, MyClass &myObj);
Also, what you actually need to register as a meta type is Service and not QList<Service>. Once service is registered and its streaming operators are implemented you should be all set, Qt knows how to handle the QList part.