QSortFilterProxyModel is not filtering

[ThomasKK]

I have a very simple use case. I have subclassed a QListView to only show items from a model that have "table" written in the fourth column. So I subclass setModel to catch the sourcemodel and show the proxymodel instead. But the model still shows all items and it doesn't filter.

What could be the error here?

void OListView::setModel(QAbstractItemModel *model)
{
    m_proxymodel->setSourceModel( model );
    m_proxymodel->setFilterRegExp( QRegExp("table", Qt::CaseInsensitive,
                                       QRegExp::FixedString) );
    m_proxymodel->setFilterKeyColumn( 4 );
    QListView::setModel( m_proxymodel );
}

[artwaw]

Hi,
I am not sure if your approach is sound.
Particularly you don't need to subclass QListView at all.
Secondly, QRegExp is deprecated, you should use QRegularExpression (there is a separate setter method, setFilterRegularExpression
So, the approach would be (apart from using QRegularExpression):

• have a table model, let's say QSqlTableModel;
• then have a filtermodel - QSortFilterProxyModel;
• set source model in the filtermodel and assign filtermodel itself as a model to QListView with setModel() method.

It is all described in the documentation.

Having said that - after implementing the approach given above it all should work. You should also not forget to set filterRole property if the role you use is different than Qt::DisplayRole.

Please try and let us know if this sorted your problem out or if you need more help.

[JonB]

@ThomasKK
In addition to what @artwaw has written.

have "table" written in the fourth column.

Why setFilterReg...() anything when there is QSortFilterProxyModel::setFilterFixedString(), does that do a fixed string without any regular expressions?

What do you mean by "fourth"? How does that compare to your setFilterKeyColumn( 4 )? Fifth??

[ThomasKK]

@JonB I have also tried with setFilterFixedString and the proxymodel still doesn't filter. I don't need to set filterRole as it is display role be default.
As I understand the docs, I shouldn't need to subclass the proxymodel for such a simple use case. It should be working out of the box.
You are right I misspelled. It should be fifth column but the code is correct.

Let me share a screen shot of the table I'm trying to filter.!