How to write ByteArray into a text file?

[babygal]

How to write ByteArray into a text file?

I tried the code below but it is not working.
Code:

QString filename = "out.txt";
 
 QModelIndex index = view->currentIndex();
    QSqlRecord record = model->record(index.row());
    int id = record.value(0).toInt();
 
   QSqlQuery query;
 
    query.exec("SELECT mesh_file FROM MESH_REPOSITORY WHERE scan_id = " +                              QString::number(id) );
    if(query.next())
    {
 
        QByteArray meshbyte = query.value(0).toByteArray();
        QFile file(filename );
             if (file.open(QIODevice::WriteOnly))
             {
                 file.write(meshbyte);
                 file.close();
             }
 
    }

QString filename = "out.txt";

 QModelIndex index = view->currentIndex();
    QSqlRecord record = model->record(index.row());
    int id = record.value(0).toInt();
  
   QSqlQuery query;

    query.exec("SELECT mesh_file FROM MESH_REPOSITORY WHERE scan_id = " +                              QString::number(id) );
    if(query.next())
    {

        QByteArray meshbyte = query.value(0).toByteArray();
        QFile file(filename );
             if (file.open(QIODevice::WriteOnly))
             {
                 file.write(meshbyte);
                 file.close();
             }

    }

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