main.cpp

#include <QGuiApplication>

#include <QtQuick/QQuickView>
#include <QSqlDatabase>
#include <QSqlError>
#include <QtQml>
#include <QQuickStyle>
static void connectToDatabase()
{
    QSqlDatabase database = QSqlDatabase::database();
    if (!database.isValid()) {
        database = QSqlDatabase::addDatabase("QSQLITE");
        if (!database.isValid())
            qFatal("Cannot add database: %s", qPrintable(database.lastError().text()));
    }

    const QString fileName = "chat-database.sqlite3";
    // When using the SQLite driver, open() will create the SQLite database if it doesn't exist.
    database.setDatabaseName(fileName);
    // When using the SQLite driver, open() will create the SQLite database if it doesn't exist.
    database.setDatabaseName(fileName);
    qDebug() << fileName;
    if (!database.open()) {
        qFatal("Cannot open database: %s", qPrintable(database.lastError().text()));
        QFile::remove(fileName);
    }
}
int main(int argc, char **argv)
{
    QGuiApplication app(argc, argv);
    QQuickStyle::setStyle("Material");
    connectToDatabase();
    QQuickView view;
    view.setColor(QColor(0,0,0,0));
    view.setResizeMode(QQuickView::SizeRootObjectToView);
    view.setSource(QUrl("qrc:///main.qml"));
    view.show();

    return QGuiApplication::exec();
}