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Extracting multiple possible custom types from QDBusVariant

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  • L Offline
    L Offline
    Lurkki
    wrote on last edited by
    #1

    I have a method on DBus returning a variant, where the return value is one of multiple custom types.

    QDBusInterface server("org.customtest", "/", "org.customtest");
    
    QDBusReply<QDBusVariant> reply = server.call("person");
    if (reply.isValid()) {
        auto arg = reply.value().variant().value<QDBusArgument>();
        Person p;
        arg >> p;
        qDebug() << p.name << p.age;
    }
    

    Now this code obviously doesn't work, when the return type isn't Person, so is there any way to identify the type of this variant?

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #2

      Hi,

      Out of curiosity, why would a call to the person endpoint return something else ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      L 1 Reply Last reply
      0
      • SGaistS SGaist

        Hi,

        Out of curiosity, why would a call to the person endpoint return something else ?

        L Offline
        L Offline
        Lurkki
        wrote on last edited by
        #3

        @SGaist This is just an example showing what I do in my actual service.

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        • SGaistS Offline
          SGaistS Offline
          SGaist
          Lifetime Qt Champion
          wrote on last edited by
          #4

          You can use canConvert.

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

          L 1 Reply Last reply
          0
          • SGaistS SGaist

            You can use canConvert.

            L Offline
            L Offline
            Lurkki
            wrote on last edited by
            #5

            @SGaist The value in the returned QDBusVariant is QDBusArgument in this case, so I cannot cast to QVariant from it.

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