Creating QJsonDocument from json returns null



  • I'm trying to create a QJsonDocument (see minimal example below) and I'm getting all the time a void QJsonDocument. If I run the small program I get:
    is null: "no error occurred"

    I'm using Qt 5.9.3 (in archlinux). Any ideas?

    #include <QCoreApplication>
    #include <QDebug>
    #include <QJsonObject>
    #include <QJsonDocument>
    #include <QJsonParseError>
    
    int main(int argc, char *argv[])
    {
        QCoreApplication a(argc, argv);
        QString json_str;
        QJsonDocument json_doc;
        QJsonParseError error_json;
    
        json_str = "{\"country\": \"Germany\", \"population\": 100 }";
    
        json_doc.fromJson(json_str.toUtf8(), &error_json);
    
        if (json_doc.isNull())
            qDebug() << "is null: " << error_json.errorString();
        else
            qDebug() << "is not null";
    
        return a.exec();
    }
    
    


  • fromJson is static and returns the parsed document http://doc.qt.io/qt-5/qjsondocument.html#fromJson

    json_doc=QJsonDocument::fromJson(json_str.toUtf8(), &error_json);



  • you're right @VRonin. It's working now. THanks a lot. Sorry for the noise.


Log in to reply
 

Looks like your connection to Qt Forum was lost, please wait while we try to reconnect.