PostgreSql and problem with lastInsertId()

[Hostel]

I have a problem with method lastInsertId. I'm using a PostgreSql 8.4 and Qt 4.6.3 under Linux. I have a code like this:
@
// _model is a QSqlTableModel
QSqlRecord record = _model->record();
_model->insertRecord( -1, record );

SomeDialog* dialog = new SomeDialog( _model );
dialog->exec();
if( dialog->result() == QDialog::Accepted )
{
    bool ok = _model->submitAll();
    if( ok )
    {
        // allways 0 but in db is a new record
        qDebug() << _model->query().lastInsertId().toInt();
    }
    else
    {
        qDebug() << _model->lastError().text();
    }
}

@

My table looks like this:

@
CREATE TABLE mytable
(
id serial NOT NULL,
field1 text,
CONSTRAINT mytable_pkey PRIMARY KEY (id),
)
WITH (
OIDS=TRUE
);
@

How can I get a inserted ID? I need select new row in QTableView and I need this information.

[lgeyer]

As far as I know lastInsertId() for PostgreSQL is supported at least with Qt 4.7. If this is not an option for you you might try the "RETURNING":http://www.postgresql.org/docs/8.3/interactive/sql-insert.html clause in your queries.

[Hostel]

Thanks for reply. Tomorrow I will test Qt 4.7. lastInsertId() returns a OIDS number from Pg(I know from Qt doc), but only in QSqlQuery(I tested this a few minuts ago), but with QSqlTableModel return always 0. I known a RETURNING but I want to stay with QSqlTableModel. Maybe I will change a little driver to Pg to implement a insert with returning. I need think about it what would be better.