QDBus register type `QMap<QString,QString>'

xixi_cly

When I use QDBus to call function,it remind me that:
QDBusMarshaller: type `QMap<QString,QString>' (1045) is not registered with D-BUS. Use qDBusRegisterMetaType to register it
QDBusConnection: error: could not send message to service "org.ofono" path "/" interface "org.ofono.VoiceCallManager" member "Dail": Marshalling faild: Unregistered type QMap<QString,QString> passed in arguments
void ofono::Dial() "Marshalling failed: Unregistered type QMap<QString,QString> passed in arguments"

But I don't konw how to register type `QMap<QString,QString>' .
Best Wishes.
code_text

QDBusInterface interfaceOfono("org.ofono",
                              "/",
                              "org.ofono.VoiceCallManager",
                              QDBusConnection::systemBus());

QDBusMessage msg;
QList<QVariant> param;
QMap<QString, QString> map;
QString number = "xxxxxxxxxxx";
map.insert("number", number);
qDebug() << "telephone number: " << number;
QVariant var = QVariant::fromValue(map);
msg = interfaceOfono.call(QDBus::Block, "Dail", var);

jsulm

@xixi_cly The error already suggests to use qDBusRegisterMetaType. Did you read its documentation: https://doc.qt.io/qt-5/qdbusargument.html#qDBusRegisterMetaType ? It even has an example.

xixi_cly

@jsulm May I should use Q_DECLARE_METATYPE() first,then register it with qDBusRegisterMetaType<MyClass>();?
I have tried this:

#include <QDBusMetaType>
#include <QMetaType>

Q_DECLARE_METATYPE(QMap(QString, QString))
qDBusRegisterMetaType<QMap(QString, QString)>();

But it's not right.

jsulm

@xixi_cly said in QDBus register type `QMap<QString,QString>':

qDBusRegisterMetaType<QMap(QString, QString)>();

This is wrong. Should be:

qDBusRegisterMetaType<QMap<QString, QString>>();

xixi_cly

@jsulm There are also some errors:
D:\Demo\qt\phonebook\ofono.cpp:11: error: C++ requires a type specifier for all declarations
D:\Demo\qt\phonebook\ofono.cpp:11: error: template specialization requires 'template<>'

alt text

jsulm

@xixi_cly Then change it to

qDBusRegisterMetaType<QMap<QString, QString> >();

You seem to use an older C++ compiler, newer compiler can handle >> in template definitions just fine.

xixi_cly

@jsulm Thank you.After put it in the function, I have solved the problem.