Does QSqlTableModel have a limit of records?

[A Former User]

Does QSqlTableModel have a limit of records that can be retrieved?

Why am I asking this?
When I retrieve 9305 database records and apply a QSortFilterProxyModel to the QSqlTableModel my search works. However, when I have 9306 database records the search does not work anymore as expected.

I can't find any error in the database in the column I am searching. But I'm happy to provide it if someone wants to have a look if they find an error. The database is generated by a python script.

Do you have any idea what the problem could be if there is no limit?

[JonB]

@Gabber
There should be no such limit. And certainly not at 9,306!

Re-look at your code. You can show it if you wish, but it probably won't help.

Don't forget: your QSqlTableModel should have been filled via while (canFetchMore()) fetchMore(); If you have not done this your in-memory records to search may be incomplete.

[A Former User]

@JonB
Thank you very much. You are a hero!

@JonB said in Does QSqlTableModel have a limit of records?:

while (canFetchMore()) fetchMore();

That solved my problem. Now my code looks like this:

QSqlTableModel *DatabaseManager::fungusTable() const
{
    QSqlTableModel *model = new QSqlTableModel;
    model->setTable("Pilze");
    model->setSort(1, Qt::AscendingOrder);
    model->setEditStrategy(QSqlTableModel::OnManualSubmit);
    model->select();
    while (model->canFetchMore()) {
        model->fetchMore();
    }
    return model;
}

Thanks for your help!

[JonB]

@Gabber
Yup. QSortFilterProxyModel is an in-memory-proxy-only, it passes neither the sort nor the filter to the QSqlTableModel (for execution at the SQL side) but rather just sorts/filters what is already in the underlying in-memory model.

OOI, what version of Qt are you using? Qt6?? Until now/so far as I know QSqlTableModel has always had a value of 256 hard-coded for how many rows it fetches before you have to fetchMore(). Yours looks like that has been increased to 9,306?

[A Former User]

@JonB
I have Qt-Version 5.15.3.