main.cpp

#include <QGuiApplication>
#include <QQmlApplicationEngine>
#include <QQmlContext>
#include <QDebug>

#include "usermodel.h"
#include "database.h"

int main(int argc, char *argv[])
{
#if QT_VERSION < QT_VERSION_CHECK(6, 0, 0)
    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
#endif

    QGuiApplication app(argc, argv);
    app.setOrganizationName("Some Company");
    app.setOrganizationDomain("somecompany.com");
    app.setApplicationName("Amazing Application");


    QQmlApplicationEngine engine;

    Database *database = new Database();
    database->openDatabase();
    qDebug() << "database is connected: " << database->isConnected();

    UserModel *model2 = new UserModel(nullptr, database);


    engine.rootContext()->setContextProperty("userModel", model2);

    engine.addImportPath("qrc:/");
    const QUrl url(QStringLiteral("qrc:/main.qml"));
    QObject::connect(&engine, &QQmlApplicationEngine::objectCreated,
                     &app, [url](QObject *obj, const QUrl &objUrl) {
        if (!obj && url == objUrl)
            QCoreApplication::exit(-1);
    }, Qt::QueuedConnection);
    engine.load(url);

    return app.exec();
}