How to filter QSqlRelationalTable?

[istdasklar]

When I do this :

model = new QSqlRelationalTableModel;
model->setTable("table");
tableView->setModel(model);
model->setFilter ("id = 660");

model = new QSqlRelationalTableModel;
model->setTable("table");
tableView->setModel(model);
model->setFilter ("id = 660");

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IT's Works!


But when I do this :

model = new QSqlRelationalTableModel;
model->setTable("personne");
model->setRelation(3, QSqlRelation("status", "id", "nom"));
tableView->setItemDelegate(new QSqlRelationalDelegate(tableView));
tableView->setModel(model);
model->setFilter ("id = 660");

model = new QSqlRelationalTableModel;
model->setTable("personne");
model->setRelation(3, QSqlRelation("status", "id", "nom"));
tableView->setItemDelegate(new QSqlRelationalDelegate(tableView));
tableView->setModel(model);
model->setFilter ("id = 660");

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It's doesn't work !! Why ?