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class MyFilterProxyModel : public QSortFilterProxyModel
{
    Q_OBJECT
public:
    MyFilterProxyModel(QObject *parent = 0);
protected:
    bool filterAcceptsRow(int source_row, const QModelIndex &source_parent) const;

};

#include <QtGui>
#include "mysortfilterproxymodel.h"

MyFilterProxyModel::MyFilterProxyModel(QObject *parent)
    : QSortFilterProxyModel(parent)
{
}

bool MyFilterProxyModel::filterAcceptsRow(int sourceRow,
        const QModelIndex &sourceParent) const
{
    QModelIndex index1 = sourceModel()->index(sourceRow, 1, sourceParent);
    return (sourceModel()->data(index1).toString().contains(filterRegExp()));
}

\\\\\\\\\\\\\\\\\\\\\
    model = new QSqlTableModel(this);
    proxy = new MyFilterProxyModel(this);
    proxy->setDynamicSortFilter(true);
    proxy->setSourceModel(model);
    ui->tableView->setModel(proxy);

 
QModelIndex index0 = sourceModel()->index(sourceRow, 1, sourceParent);
QModelIndex index1 = sourceModel()->index(sourceRow, 2, sourceParent);

return (sourceModel()->data(index0).toString().contains(filterRegExp())
            || sourceModel()->data(index1).toString().contains(filterRegExp()));

bool MyFilterProxyModel::filterAcceptsRow(int sourceRow,
                                          const QModelIndex sourceParent) const {
    return true;
}

   
qDebug() << model->rowCount() << " rows loaded in model";

0 rows loaded in model