This line of the previous code:

query->exec(QLatin1String("create table equipments (id int primary key, ipaddress varchar(15), location varchar(50), serial varchar(32)"));

Is wrong. ;-)

BTW this is an extract of what I achivied until now:

database = QSqlDatabase::addDatabase("QSQLITE");
database.setDatabaseName("database.db");
if(database.isValid())
{   
    database.open();
    if(database.isOpen())
    {
        QSqlQuery *query = new QSqlQuery(database);
        query->exec(QLatin1String("CREATE TABLE equipments (id INTEGER PRIMARY KEY, ipaddress TEXT NOT NULL, location TEXT NOT NULL, serial TEXT NOT NULL);"));
        // query->exec(QLatin1String("insert into equipments (id, ipaddress, location, serial) values(?, ?, ?);"));

        /*query->addBindValue("0");   
          query->addBindValue("10.1.0.1");
          query->addBindValue("MyLocation");
          query->addBindValue("abcdefgh");
          query->exec();*/



        database.commit();
    }
    else
        QMessageBox::information(this, "Error", "Couldn't open database!" +  database.lastError().text());
}

tableModel = new QSqlTableModel(this);
tableModel->setTable("equipments");
tableModel->setEditStrategy(QSqlTableModel::OnManualSubmit);
tableModel->setHeaderData(ID, Qt::Horizontal,QObject::tr("ID"));
tableModel->setHeaderData(IP, Qt::Horizontal,QObject::tr("IP"));
tableModel->setHeaderData(LOC, Qt::Horizontal, QObject::tr("Location"));
tableModel->setHeaderData(SN, Qt::Horizontal, QObject::tr("Serial"));
tableModel->select();

tableModel->insertRows(0, 1);
tableModel->setData(tableModel->index(0, ID), 0);
tableModel->setData(tableModel->index(0, IP), "10.0.0.1");
tableModel->setData(tableModel->index(0, LOC), "MyHome");
tableModel->setData(tableModel->index(0, SN), "abde767");
tableModel->submitAll();

tableView = new QTableView;
tableView->setModel(tableModel);
tableView->show();
tableView->setSelectionMode(QAbstractItemView::SingleSelection);
tableView->setSelectionBehavior(QAbstractItemView::SelectRows);
// tableView->setColumnHidden(ID, true);
tableView->resizeColumnsToContents();
tableView->setEditTriggers(QAbstractItemView::NoEditTriggers);
tableView->horizontalHeader()->show();

Perhaps there are better ways to start the tableModel, but now I am able to view the header and the content !

You should always check the result of the queries you run and that is missing from your code.

The database file creation is not necessarily a sign of anything. It's the default behaviour of SQLite. When the file path given to it points to a file that does not exists, it creates it.

@SGaist said in QSqlTableModel and QTableView: table headers not shown.:

I'm not saying it's the solution but from the looks of it, you are missing one header data since you don't hide the id column.

Thanks for advising on this.
However, nothing changes.

Also, the database.db it's created but remains empty.

I'm not saying it's the solution but from the looks of it, you are missing one header data since you don't hide the id column.

On a side note, there's no reason to keep a QSqlQuery object on the heap. They are usually created on stack at the moment of use.

As I also already many times already: don't keep a private QSqlDatabase member variable. QSqlDatabase already handles these objects for you.